GMCS,

Your friend is likely right about the Spanish manufacture as I have an original case (marked as Spanish made) that is identical to your finished one in every regard except having been made for a pair of 28" guns. According to its stickers/decals, the case was annually stored for the owner by Holland & Holland and even made a trip on the Edinburgh-Waverley Line - British Transport Co. - date unknown. They are neat, old cases....yours being especially nice because of your craftsmanship.

Rob