Buck manufactured two different groups of bayonets for sales in Japan. One group had a standard crossguard (as seen in the photo above) and the plain butt cap in place of the bayonet pommel. The other group had the blank pommel and a crossguard without the hole for the muzzle ring. I don't have the production numbers handy but can post them Monday. I have the model that is not shown above, I'll post a photo tomorrow.
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