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Commonly called a Miller 6½", this Miller head lamp is actually cataloged as a Miller7"

	Miller 7" LAMPS Headlamps Type 74CV. 74E. 77CV. 73EI
	Type	Description
	75V/832	Ammeter
	S.101	Front Rim
	S.102F	Moulded Glass 6½" dia
	S.103	Kautex Washer
	S.105	Glass Fixing Wires (set of 4)
	S.106	Reflector less Bulb Holder
	S.106B	Bulb Holder
	S.109	Lamp Body for Switch and Ammeter
	S.77	Lamp Body for Switch and Warning Light only
	S.110	Lamp Securing Bolt and Washer (2 of each) per set
	S.133	Ammeter Rubber Ring
	S.136	Ammeter Fixing Bridge
	S.137	Ammeter Securing Nuts & Washers (2 of each) per set
	#200	Pilot bulb 6v, 3watt S.C.C. 18mm BA15s base, Lucas #200
	#168	Headlamp bulb 24/24 watt S.B.C. 38mm BA15d base, Lucas #168

S.B.C. - Standard Bayonet Cap
S.C.C. - Single Center Contact
B.P.F. - British Pre-Focus
MES - Minature Edison Screw

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Description	Notes
Lucas #168 BA15d
Lucas #200 BA15s

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Commonly found  Miller Replacement Headlamp for Vincent - Miller # 179CV

1954 magzine ad to show graphic version of new Miller headlamp. Please note sealed lens/reflector, pilot at top position, no hole for light bleed to ammeter.
Incorrectly label as 179CU should be 179CV

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Page from Miller catalog with parts picture for 179CV and other versions of same

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179CV Bulb information

Description	Notes
Headlamp bulb for 179CV Lucas 312
Pilot lamp bulb for 179CV E10 base, 6volt, 2-3watt #CEC40 #1482

http://www.donsbulbs.com

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Lucas horn tone disc dimensions - 700213
OD - 2.67", ID bore - 0.57", Thickness - 0.095", Material - aluminum sheet, Paint - wrinkle black

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Add a front brake switch to illuminate rear brake light when applying front brake -
D series Vincent added a Lucas switch to the fork plate FF32 and wiring to suit. As you apply front brake, the balance beam comes up on right side and activates the Lucas switch. Normally these Lucas switches are pulled to activate, but this time it is used in push mode.