DETAILS

Ser	Marking	No of Stops	End Profile	Stop Posn	Material	Finish	Colour	Manufacturer	Notes
Undated
1	No marking, Ver 1	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown	End profile '1'
2	No marking, Ver 2	1	4	Middle	Steel	Phosphated	Lt Gray	Unknown	End profile '4'
3	AR	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown	' AR ' joined together
4	MB 4	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown	' MB ' joined together Markings under spring
1964
5	RACMANN IQVI8A I964	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown
1965
6	IQV I8A AR 65	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown	' AR ' joined together Markings under spring
7	IQVI8A (E/L) I965	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown	E / L inside a segmented circle
8	IQVI8A[MB4]65	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown	MB4 inside a rectangle Markings under spring
9	IQV18A[MB4]65	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown	MB4 inside a rectangle Markings under spring
10	IQV18A[MB4]65	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown	MB4 inside a rectangle Markings under spring
11	IQVI8A[MB4]-65	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown	MB4 inside a rectangle Markings under spring
12	IQV 18A [MB4] 65	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown	' MB ' joined together MB4 inside a rectangle Markings under spring
13	IQV18ANE65	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown	' NE ' joined together Markings under spring
14	IQV 18 A P.C.I. 1965	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown
15	IQV  I8   A  P.C.I.-1965	1	1	Middle	Steel	Phosphated	Dk Gray	Unknown
16	RACMANN IQVI8A I965	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown
1966
17	IQV I8A AR 66	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown	' AR ' joined together Markings under spring
18	IQVI8A (E/L) I966	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown	E / L inside a segmented circle
19	IQV18A<KOI>I966	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown	KOI inside a diamond
20	IQVI8A [MB 3] 66	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown	MB3 inside a rectangle Markings under spring
21	IQV18A[MB4]66	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown	' MB ' joined together MB4 inside a rectangle Markings under spring
22	IQVI8A[MB4]66	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown	MB4 inside a rectangle Markings under spring
23	IQV18A [MB 4] 66	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown	MB4 inside a rectangle Markings under spring
24	IQV I8 A P.C.I. I966	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown
25	IQVI8A P.C.I. I966	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown
26	IQV 18 A P.C.I.1966	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown
27	IQV 18 A P.C.I. 1966	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown
28	IQV  18A P.C.I.1966	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown
29	RACMANN IQVI8A 1966	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown
30	RACMANN IQVI8A I966	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown
1967
31	IQVI8A (EL) I967	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown	E-over-L inside a segmented circle
32	IQVI8A (E/L) I967	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown	E / L inside a segmented circle
33	IQV18ANE67	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown	' NE ' joined together Markings under spring
34	IQV  I8A P.C.I. I967	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown
35	IQV  I8A  P.C.I. I967	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown
36	IQV I8A  P.C.I. I967	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown
1968
37	IQVI8A(EL)I968	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown	E-over-L inside a segmented circle
38	IQV18A [MB 4] 68	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown	MB4 inside a rectangle Markings under spring
39	IQV18ANE68	1	1	Middle	Steel	Phosphated	Lt Gray	Unknown	' NE ' joined together Markings under spring
1969
40	IQV I8A P.C.I.I969	1	1	Middle	Steel	Phosphated	Black	Unknown
Ser	Marking	No of Stops	End Profile	Stop Posn	Material	Finish	Colour	Manufacturer	Notes

Thank you to Loren Peterson for these examples.
Thank you to "the lone gunman" for the new examples.
Thank you to Scott Metzger for the new examples.
Thank you to David Lansky for the new examples.

PHOTOS

Undated
No marking, Ver 1 (End profile '1')	AR (' AR ' joined together)
No marking, Ver 2 (End profile '4')	MB 4 (' MB ' joined together)
1964
RACMANN IQVI8A I964
1965
IQV I8A AR 65 (under spring) (' AR ' joined together)	IQV 18A [MB4] 65 (under spring) (' MB ' joined together)
IQVI8A (E/L) I965	IQV18ANE65 (under spring) (' NE ' joined together)
IQVI8A[MB4]65 (under spring)	IQV 18 A P.C.I. 1965
IQV18A[MB4]65 (under spring)	IQV   I8    A  P.C.I.-1965
IQV18A[MB4]65 (under spring)	RACMANN IQV I8A I965
IQVI8A[MB4]-65 (under spring)
1966
IQV I8A AR 66 (under spring) (' AR ' joined together)	IQV I8 A P.C.I. I966
IQVI8A (E/L) I966	IQVI8A P.C.I. I966
IQVI8A <KOI> I966	IQV 18 A P.C.I. 1966
IQVI8A [MB 3] 66 (under spring)	IQV 18 A P.C.I. 1966
IQV18A[MB4]66 (under spring) (' MB ' joined together)	IQV  18A P.C.I.1966
IQV18A [MB4] 66 (under spring)	RACMANN IQV I8A 1966
IQVI8A[MB 4]66 (under spring)	RACMANN IQV I8A I966
1967
IQVI8A (EL) I967	IQV I8A P.C.I. I967
IQVI8A (E/L) I967 (under spring)	IQV  I8A  P.C.I. I967
IQV18ANE67 (under spring) (' NE ' joined together)	IQV I8A  P.C.I. I967
1968
IQVI8A (EL) I968	IQV18ANE68 (under spring) (' NE ' joined together)
IQV18A [MB 4] 68 (under spring)
1969
IQVI8A P.C.I.I969

MEASUREMENTS

All measurements in millimeters

Ser	Markings	Length	Width	Width with stops	Depth	Retainer length	Material Thickness	Retainer Holes		Spring Profile	Notes
								Height	Width
Undated
1	No marking, Ver 1	60.34	14.36	15.16	5.32	2.18	0.60	3.24	4.88		End profile '1'
2	No marking, Ver 2	60.43	14.48	15.26	5.50	2.01	0.57	3.42	4.97		End profile '4'
3	AR	60.42	14.53	15.27	5.33	2.24	0.69	3.11	5.00		' AR ' joined together
4	MB 4	60.55	14.39	15.43	5.26	1.34	0.65	3.81	5.02		' MB ' joined together Markings under spring
1964
5	RACMANN IQVI8A I964	60.24	14.45	15.15	5.43	2.18	0.61	3.58	5.01
1965
6	IQV I8A AR 65	60.76	14.42	15.13	5.27	1.90	0.61	3.45	4.68		' AR ' joined together Markings under spring
7	IQVI8A (E/L) I965	60.32	14.42	15.30	5.44	2.00	0.60	3.58	4.98		E / L inside a segmented circle
8	IQVI8A[MB4]65	60.41	14.42	15.53	5.19	2.05	0.61	3.47	5.12		MB4 inside a rectangle Markings under spring
9	IQV18A[MB4]65	60.49	14.36	15.40	5.16	2.28	0.62	3.24	5.03		MB4 inside a rectangle Markings under spring
10	IQV18A[MB4]65	60.55	14.46	15.41	5.25	2.03	0.65	3.39	5.01		MB4 inside a rectangle Markings under spring
11	IQVI8A[MB4]-65	60.49	14.35	15.40	5.34	2.09	0.68	3.34	5.05		MB4 inside a rectangle Markings under spring
12	IQV 18A [MB4] 65	60.28	14.45	15.11	5.27	1.80	0.65	3.20	5.09		' MB ' joined together MB4 inside a rectangle Markings under spring
13	IQV18ANE65	60.80	14.57	15.40	5.34	2.13	0.60	3.14	4.88		' NE ' joined together Markings under spring
14	IQV 18 A P.C.I. 1965	60.28	14.50	15.14	5.29	2.19	0.64	3.36	5.03
15	IQV  I8   A  P.C.I.-1965	60.35	14.65	15.36	5.34	2.17	0.57	3.34	5.10
16	RACMANN IQVI8A I965	60.46	14.65	15.29	5.49	2.18	0.60	3.21	4.98
1966
17	IQV I8A AR 66	60.68	14.49	15.11	5.40	2.43	0.55	3.37	4.90		' AR ' joined together Markings under spring
18	IQVI8A (E/L) I966	60.25	14.55	15.34	5.35	2.22	0.60	3.67	4.86		E / L inside a segmented circle
19	IQV18A<KOI>I966	60.33	14.45	15.34	5.46	2.08	0.57	3.40	4.86		KOI inside a diamond
20	IQVI8A [MB 3] 66	60.42	14.56	15.50	5.20	2.05	0.55	3.34	4.99		MB3 inside a rectangle Markings under spring
21	IQV18A[MB4]66	60.39	14.43	15.29	5.43	2.23	0.55	3.27	5.00		' MB ' joined together MB4 inside a rectangle Markings under spring
22	IQVI8A[MB4]66	60.37	14.44	15.79	5.31	2.15	0.59	3.29	5.01		MB4 inside a rectangle Markings under spring
23	IQV18A [MB 4] 66	60.32	14.26	15.05	5.51	2.16	0.59	3.36	4.83		MB 4 inside a rectangle Markings under spring
24	IQV I8 A P.C.I. I966	60.46	14.57	15.47	5.58	2.24	0.58	3.69	5.14
25	IQVI8A P.C.I. I966	60.64	14.78	15.46	5.25	2.33	0.60	3.23	5.01
26	IQV 18 A P.C.I.1966	60.23	14.57	15.23	5.47	2.38	0.57	3.26	5.02
27	IQV 18 A P.C.I. 1966	60.32	14.58	15.22	5.34	2.37	0.60	3.35	5.04
28	IQV  18A P.C.I.1966	60.45	14.89	15.36	5.33	2.36	0.59	3.44	4.86
29	RACMANN IQVI8A 1966	60.20	14.45	15.52	5.34	2.21	0.60	3.21	4.81
30	RACMANN IQVI8A I966	60.46	14.60	15.78	5.33	2.20	0.52	3.63	5.03
1967
31	IQVI8A (EL) I967	60.34	14.50	15.18	5.38	2.10	0.54	3.22	4.96		E-over-L inside a segmented circle
32	IQVI8A (E/L) I967	60.23	14.64	15.35	5.00	2.37	0.55	3.76	4.96		E / L inside a segmented circle
33	IQV18ANE67	60.53	14.54	15.25	5.28	2.33	0.60	3.10	4.99		Markings under spring
34	IQV  I8A P.C.I. I967	60.71	14.64	15.57	5.38	2.23	0.59	3.16	4.87
35	IQV  I8A  P.C.I. I967	60.53	14.55	15.31	5.38	2.09	0.61	3.06	4.75
36	IQV I8A  P.C.I. I967	60.72	14.66	15.16	5.28	2.28	0.59	3.26	5.03
1968
37	IQVI8A(EL)I968	60.44	14.50	15.46	5.29	2.22	0.61	3.21	5.05		E-over-L inside a segmented circle
38	IQV18A [MB 4] 68	60.38	14.35	15.39	5.21	2.30	0.57	3.42	5.06		MB4 inside a rectangle Markings under spring
39	IQV18ANE68	60.11	14.44	15.21	5.36	2.39	0.60	3.46	5.02		' NE ' joined together Markings under spring
1969
40	IQV I8A P.C.I.I969	60.28	14.43	15.22	5.36	2.20	0.58	3.28	5.08
Ser	Markings	Length	Width	Width with stops	Depth	Retainer length	Material Thickness	Height	Width	Spring Profile	Notes
								Retainer Holes

All measurements in millimeters

PRODUCTION YEARS