Crain's Scale / Gauge Encyclopedia
	C. 1993-2004  E. R. Crain   All Rights Reserved      Updated 15 Apr 2003 email us
	43	Scale Name:		Continental OO Scale
		Scale Ratio:		1:100
		Alternate Names:		OOC Scale			1 cm = 1 meter			("Oh-Oh-Cee")
				C Scale (C = 100)			D Scale (D = Decimal)			H Scale (H = Hundred)
			Represented			Scale		Model Track Gauge				Error	Track
		Ser #	Gauge	Inches	Ratio	In/ft	mm/ft	Inches		mm		%	Used
		Correct Gauge:
	43	1033	4ft 8.5in	56.5	100	0.120	3.05	0.565		14.35		0.0
	43	1034	Meter	39.4	100	0.120	3.05	0.394		10.01		0.0
	43	1035	3 Foot	36	100	0.120	3.05	0.360		9.14		0.0
	43	1036	2.5 Foot	30	100	0.120	3.05	0.300		7.62		0.0
	43	1037	2 Foot	24	100	0.120	3.05	0.240		6.10		0.0
	43	1038	15 Inch	15	100	0.120	3.05	0.150		3.81		0.0
		Commonly Used Gauges
	43	1039	OOC Gauge	56.5	100	0.120	3.05	0.563		14.30		-0.4
	43	1040	OOCm Gauge	39.4	100	0.120	3.05	0.394		10.00		0.0
	43	1041	HOO Gauge	39.4	100	0.120	3.05	0.394		10.00		0.0
	43	1042	N Gauge	39.4	100	0.120	3.05	0.353	0.367	8.97	9.32	-10.4	Nstd
	43	1043	Cn3 Gauge	36	100	0.120	3.05	0.353	0.367	8.97	9.32	-1.9	Nstd
	43	1044	N Gauge	36	100	0.120	3.05	0.353	0.367	8.97	9.32	-1.9	Nstd
	This is a rare European scale. The C in OOC stands for "Cent" - French for "Hundred".
	Some US modelers like this scale for 3 ft narrow gauge on N Gauge track.
	Crain's Scale / Gauge Encyclopedia
	44	Scale Name:		British TT Scale
		Scale Ratio:		1:102
		Alternate Names:		3 mm = 1 foot			3 mm Scale
				TM Scale			TT3 Scale			Scale 3
			Represented			Scale		Model Track Gauge				Error	Track
		Ser #	Gauge	Inches	Ratio	In/ft	mm/ft	Inches		mm		%	Used
		Correct Gauge:
	44	1045	4ft 8.5in	56.5	102	0.118	3.00	0.554		14.07		0.0
	44	1046	Meter	39.4	102	0.118	3.00	0.386		9.81		0.0
	44	1047	3 Foot	36	102	0.118	3.00	0.353		8.96		0.0
	44	1048	2.5 Foot	30	102	0.118	3.00	0.294		7.47		0.0
	44	1049	2 Foot	24	102	0.118	3.00	0.235		5.98		0.0
	44	1050	15 Inch	15	102	0.118	3.00	0.147		3.74		0.0
		Commonly Used Gauges
	44	1051	TT(Brit)	56.5	102	0.118	3.00	0.472		11.99		-14.8
	44	1052	102 / 12 Ga	56.5	102	0.118	3.00	0.472		11.99		-14.8
	44	1053	TM Gauge	56.5	102	0.118	3.00	0.531		13.49		-4.1
	44	1054	TT-3 Gauge	48	102	0.118	3.00	0.471	0.483	11.96	12.27	0.1	TTstd
	44	1055	TT Gauge	48	102	0.118	3.00	0.471	0.483	11.96	12.27	0.1	TTstd
	44	1056	TT-9 Gauge	36	102	0.118	3.00	0.353	0.367	8.97	9.32	0.0	Nstd
	44	1057	TTn3 Gauge	36	102	0.118	3.00	0.353	0.367	8.97	9.32	0.0	Nstd
	44	1058	9 mm Gauge	36	102	0.118	3.00	0.353	0.367	8.97	9.32	0.0	Nstd
	44	1059	N Gauge	36	102	0.118	3.00	0.353	0.367	8.97	9.32	0.0	Nstd
	As in OO Scale, British TT uses a larger scale to keep the locomotive narrow
	enough. However, some newer British outline is available at 1:120 (USA TT
	Scale). TM is the fine scale version.
	Crain's Scale / Gauge Encyclopedia
	45	Scale Name:		TT-X Scale
		Scale Ratio:		1:108
		Alternate Names:		1/9 inch = 1 foot			("Tee-Tee-Ex")
			Represented			Scale		Model Track Gauge				Error	Track
		Ser #	Gauge	Inches	Ratio	In/ft	mm/ft	Inches		mm		%	Used
		Correct Gauge:
	45	1060	4ft 8.5in	56.5	108	0.111	2.82	0.523		13.29		0.0
	45	1061	Meter	39.4	108	0.111	2.82	0.365		9.27		0.0
	45	1062	3 Foot	36	108	0.111	2.82	0.333		8.47		0.0
	45	1063	2.5 Foot	30	108	0.111	2.82	0.278		7.06		0.0
	45	1064	2 Foot	24	108	0.111	2.82	0.222		5.64		0.0
	45	1065	15 Inch	15	108	0.111	2.82	0.139		3.53		0.0
		Commonly Used Gauges
	45	1066	TT-X Gauge	56.5	108	0.111	2.82	0.471	0.483	11.96	12.27	-10.0	TTstd
	45	1067	TT Gauge	56.5	108	0.111	2.82	0.471	0.483	11.96	12.27	-10.0	TTstd
	45	1068	TT-Xm Ga	39.4	108	0.111	2.82	0.353	0.367	8.97	9.32	-3.2	Nstd
	45	1069	TT-9 Gauge	39.4	108	0.111	2.82	0.353	0.367	8.97	9.32	-3.2	Nstd
	45	1070	9 mm Gauge	39.4	108	0.111	2.82	0.353	0.367	8.97	9.32	-3.2	Nstd
	45	1071	N Gauge	39.4	108	0.111	2.82	0.353	0.367	8.97	9.32	-3.2	Nstd
	45	1072	TTn3 Gauge	36	108	0.111	2.82	0.353	0.367	8.97	9.32	5.9	Nstd
	45	1073	TT-9 Gauge	36	108	0.111	2.82	0.353	0.367	8.97	9.32	5.9	Nstd
	45	1074	9 mm Gauge	36	108	0.111	2.82	0.353	0.367	8.97	9.32	5.9	Nstd
	45	1075	N Gauge	36	108	0.111	2.82	0.353	0.367	8.97	9.32	5.9	Nstd
	This was an attempt a finer scale that did not sell.
	Crain's Scale / Gauge Encyclopedia
	46	Scale Name:		TT-J Scale
		Scale Ratio:		1:110
		Alternate Names:		1/9 inch = 1 foot			("Tee-Tee-Jay")
			Represented			Scale		Model Track Gauge				Error	Track
		Ser #	Gauge	Inches	Ratio	In/ft	mm/ft	Inches		mm		%	Used
		Correct Gauge:
	46	1076	4ft 8.5in	56.5	110	0.109	2.77	0.514		13.05		0.0
	46	1077	Meter	39.4	110	0.109	2.77	0.358		9.10		0.0
	46	1078	3 Foot	36	110	0.109	2.77	0.327		8.31		0.0
	46	1079	2.5 Foot	30	110	0.109	2.77	0.273		6.93		0.0
	46	1080	2 Foot	24	110	0.109	2.77	0.218		5.54		0.0
	46	1081	15 Inch	15	110	0.109	2.77	0.136		3.46		0.0
		Commonly Used Gauges
	46	1082	TT Gauge	56.5	110	0.109	2.77	0.471	0.483	11.96	12.27	-8.3	TTstd
	46	1083	TTj Gauge	56.5	110	0.109	2.77	0.471	0.483	11.96	12.27	-8.3	TTstd
	46	1084	110 / 12 Ga	56.5	110	0.109	2.77	0.471	0.483	11.96	12.27	-8.3	TTstd
	TT Gauge at a scale of 1:110 is used in Japan.
	Crain's Scale / Gauge Encyclopedia
	47	Scale Name:		USA TT Scale
		Scale Ratio:		1:120
		Alternate Names:		1/10 inch = 1 foot			2.5 mm Scale		2.5 mm = 1 foot
			Represented			Scale		Model Track Gauge				Error	Track
		Ser #	Gauge	Inches	Ratio	In/ft	mm/ft	Inches		mm		%	Used
		Correct Gauge:
	47	1085	4ft 8.5in	56.5	120	0.100	2.54	0.471		11.96		0.0
	47	1086	Meter	39.4	120	0.100	2.54	0.328		8.34		0.0
	47	1087	3.5 Foot	42	120	0.100	2.54	0.350		8.89		0.0
	47	1088	3 Foot	36	120	0.100	2.54	0.300		7.62		0.0