240 mm Trench Mortar
240 mm Trench Mortar is a 240 mm mortar or artillery model.
Also recorded as Mortier de 240 mm; 240 mm mortar.
Overview
1915 240 mm mortar by Batignolles.
In detail
Recorded constituent parts are gun barrel.
It is associated with France.
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
“240 mm trench mortar”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q11327859: 240 mm Trench Mortar
Consult the source