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 5996-01-398-8197
NSN 5915-00-241-6459
NSN 6610-01-431-8575
NSN 6610-01-013-8922
NSN 5935-01-291-9514
NSN 6685-01-650-8200
NSN 5965-00-518-0958
NSN 6685-00-120-1009
NSN 6130-01-481-1098
NSN 5910-00-728-1422
NSN 6135-00-377-9165
NSN 5905-01-013-8937