Spa10665/8 specifies a type of engraving; 201 dash number specifies a lamp capsule
A light, with mounting facilities furnished, designed to convey information of a specific nature concerning the circuit in which inserted. Must include or provide for the use of a lens as a part of it. For items without a lens, see lampholder, and also see light (1), panel.
Classification: Electric lamps and lighting fittings, nesoi
NSN 5990-01-036-8080
NSN 6320-01-388-1067
NSN 5905-01-212-9159
NSN 6620-00-124-9515
NSN 6110-00-995-0133
NSN 5925-01-176-6467
NSN 5925-00-708-1605
NSN 5990-00-965-0495
NSN 5960-01-180-4350
NSN 6645-01-531-1355
NSN 5855-00-763-2155
NSN 5998-00-212-4406