50 cal. Hawkin Ultra- Hi By Miroku does anyone have any info on this particular model & Make

[BC140class]

I Bought this 50 cal. Flint lock from a friend of a friend for $100, I did some research and drew blanks ? The barrel is 15/16 flats and the touch hole is 1/4x28. also sent pics to L&R and was told it is a T/C lock assy. Hook breech, single trigger, beautiful gun. when i first saw it i thought it was a Thompson Center. I know Miroku manufacturers browning does anybody have any info or experience to share. Thank you BC

 

[exarcher]

Have you shot this one now? does it throw plenty of sparks?? (i see this is couple yrs back but have run across one wondering)