Brand/Subject: Brown Oil Tools Inc (BOT), Houston, Texas. Item: Vintage solid brass belt buckle commemorating the 50th Anniversary, dated 1929–1979. Front features raised BOT diamond logo with « Houston Texas » and « 50th Anniversary. » Maker marks on back: Belt Buckle Specialists, Houston, Texas; Solid Brass. Color: Antique brass/bronze tone with aged patina. Details: Rectangular shield shape, textured face with raised border and lettering, single prong and loop hardware; oilfield/energy corporate collectible.