Bulb #: 451
Voltage: 18 volts
Power: .25 amps
Base :   Screw, 3/8" dia. ( 9mm)  3-4 thread
Lens :   White
Globe:  Large-lamp 15/16" dia (24mm)
Overall height: 1-3/4" (45mm)
Description:  Flat-white painted lens when not lit.  Bright white glow when lit.

Bulb #: 461
Voltage: 14 volts
Power: .33 amps
Base :   Screw, 3/8" dia. ( 9mm)  3-4 thread
Lens :   Clear Dimple
Globe:  Medium Large-round 9/16" (14mm)
Overall height: 1-3/16" (28mm)
Description:  Clear lens when not lit.  

Bulb #: 19
Voltage: 14 volts
Power: .10 amps
Base :   2-Pin 7/32" (5mm) apart
Lens :   Clear 
Globe:  Small-round 7/16" (11mm)
Overall height: 15/16" (24mm)
Description:  Clear lens when not lit.