I have recently bought in a curious Boxlock gun by Chas. Maleham.  I bought it because it had a Boss Single Trigger,  and I collect S/Ts.   The gun is numbered as 1803 and the barrels are by Arthur Turner (Late of Maleham etc.) and were proofed in 1922.  The barrels measure as proofed. The ejectors are Maleham's Patent 9677 of 1888 and use No.150.  The ejectors are exceptionally weak with cases failing to clear the chambers.  The forend release is a huge button which when depressed,  release