Originally Posted by kahnjar1
No, the hole goes approx 2" into the tube, and if you look at the top view pic above, you will see that there are 3 pins down thru the top of the tube holding it to the stock.
If the hollow tube is to hold some sort of sighting device (as suggested above) then 2" should be sufficient for this purpose.
OK. Yes, now I see the pins holding the tube to the stock. Since the hole only travels about 2 inches, this might be evidence towards Ian's theory of some type of rear sighting apparatus. Hmmmm. At the moment, I can't think of anything else. Hopefully, if true, one of these sight pieces will turn up one day.
It's my understanding that the seperate rear sight pieces for the Japanese matchlocks are quite rare and would have easily been lost. I've only seen pictures of them from collectors in Japan.
In any case, it's a real nice piece for your collection. Hope you decide to get the missing brass decoration replaced.