7 miscellaneous dust caps for telescopes and lenses
Date: 1875-1900
Inventory Number: 1998-1-0378
Classification: Telescope Accessory
Dimensions:largest: 5.4 × 5.4 × 0.6 cm (2 1/8 × 2 1/8 × 1/4 in.)
Description:
This a miscellaneous assortment of brass dust caps for protecting the lenses of telescopes and similar optical instruments.