Assertion: gundlach periscope | /r/HasProperty | revolutionary invention
Facets:
value: by polish engineer rudolf gundlach
type: OTHER
Source sentences:
text: The Gundlach Periscope, usually known under its British designation as Vickers Tank Periscope MK.IV, was a revolutionary invention by Polish engineer Rudolf Gundlach, manufactured for Polish 7TP tanks since the end of 1935 and patented in 1936 as the Gundlach Peryskop obrotowy.