15.7 should be bore size in mm. - .618". 15.2 shows .5 mm. choke constriction - .197" approx. imp. mod. 15.5 shows .2mm choke constriction - 079" approx. imp.cyl. Don't know when it would have been imported. I would guess $3,000 to $3,500 if everything checks out, but I could be way off.

Last edited by cpa; 03/22/16 09:33 PM.