Great find! I have No. 27047. I was lucky enough to find a proper, though unmarked, holster. Every U 16 holster I have seen is a navy style as is yours. I had to replace one grip on my gun and there is a company that still has the grips. I too have been unable to locate an original spare mag, but I did find a new mag for the gun.I'd been looking for one of these for several years. I haven't yet been able to find a spare 7 round mag for it that the model 16 used.