oscillating turret
oscillating turret is a weapon turret.
Overview
Catalogue entries for furniture state timber, construction, later restoration and dimensions. VALÉORINE records this subject so that lots referring to it can be described consistently.
In detail
two-part hun turret with elevation hinge
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
“Oscillating turret”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q2568559: oscillating turret
Consult the source