One comment suggests looking beyond Vickers' main records to the suppliers and materials involved in turret construction. That approach could expose contracts, component orders, or testing activity even if the principal design file is missing. A second question asks whether firms fabricated turrets speculatively in this period and whether a Royal Navy triple 15-inch mounting was ever built. Both suggestions remain research leads, with neither mounting confirmed in the response.
Notable Point · 39:47-40:15
Industrial records and test mounts as archival leads
Supplier records, material investigations, and possible speculative test mountings offer ways to trace undocumented British triple-turret work.