curio - noun, any unusual article, object of art, etc., valued as a curiosity.
relic - noun a surviving memorial of something past. an object having interest by reason of its age or its association with the past: a museum of historic relics.
Curio and Relic License - noun, A regulation implementing federal firearms laws, 27 CFR ยง 478.11, defines curio or relic (C&R) firearms as those which are of special interest to collectors by reason of some quality other than is associated with firearms intended for sporting use or as offensive or defensive weapons
This site specializes in "digital" curios and relics. Photos, documents, field manuals, and information about military history. The site currently hosts almost 800 vintage military manuals, and over 1200 historic photos. The photos and manuals are searchable via document tags. In the Enigma Machine section the site, it has an online simulator that is compatible with Model 1 and Model 3 Enigma machines using 3 rotors.
Feedback and questions can be sent to andy @ curioandrelic.com