Yak-B
Yak-B is a rotary cannon or machine gun.
Overview
It is associated with Soviet Union. Catalogue entries for arms and armour state maker, marks, mechanism and, where relevant, licensing. VALÉORINE records this subject so that lots referring to it can be described consistently.
In detail
12.7 mm machine gun aircraft armament
Sources
Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.
reference work · Reputable secondary · Wikipedia
“YakB-12.7 machine gun”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q1047997: Yak-B
Consult the source