This is an early variation of FED 1a with smooth covering instead of textured vulcanite. The example shown may have a non-origonal, replaced covering, as existing photos and examples in collections have a smooth black covering that is much less shiny, showing an almost matte surface (please see the black and white archival photo).
This cover exists on others FEDs to. No. 491 and 607 has the same.
Known serial numbers:
#body --- #lens --------------------------------------------- collector/source
0058 ----- 58 -------------- preseries ---------------------- Alexey Nikitin
155 ------ no lens ------------------------------------------- ebay
173 ------ 1/2-turn ------------------------------------------ Photo Arsenal
253 ------ 253 ------------- totally black ------------------- private
155 ------ no lens ------------------------------------------- ebay
173 ------ 1/2-turn ------------------------------------------ Photo Arsenal
253 ------ 253 ------------- totally black ------------------- private
279 ------ ? ---------------- totally black ------------------- ussrphoto
316 ------ ? -------------------------------------------------- Знание и Труд 1936 #4
389 ------ 889/389 -------- totally black, matte cover --- private in Russia
489 ------ ? -------------------------------------------------- DVD Technik
491 ------ 491 ----------------------------------------------- private in Russia
508 ------ /508 ---------------------------------------------- private in Russia
575 ------ 1190/68 ------------------------------------------ private
608 ------ ? --------------------------------------------------
911 ------ /934/911 ----------------------------------------- Alexey Nikitin
968 ------ 1026/47/968 ------------------------------------ 1200 cameras
389 ------ 889/389 -------- totally black, matte cover --- private in Russia
489 ------ ? -------------------------------------------------- DVD Technik
491 ------ 491 ----------------------------------------------- private in Russia
508 ------ /508 ---------------------------------------------- private in Russia
575 ------ 1190/68 ------------------------------------------ private
608 ------ ? --------------------------------------------------
911 ------ /934/911 ----------------------------------------- Alexey Nikitin
968 ------ 1026/47/968 ------------------------------------ 1200 cameras
____________________________________________________________________