C.C. Bircham Model 89 Westley Richard's pattern

I have a C.O. Bircham (London) model 89 Westley Richard's patent single shot rifle in 500/450 Number 2 cartridge. I have dies and brass formed from 50-90 cases and a trim piece for a lathe - goes with the rifle. It shoots very well with 39 grains of 3031 and stuffed full with dacron or high density foam. 450 grain triple gas check lead cast bullets from Jet bullets. Bore is nice and there is no corrosion or pitting on this rifle. Let me know if there is any interest. Dellas Wiedman 1-780-518-0812 Dellas