For sale a Genuine New Old Stock BTH Magneto distributor cap with Terminals fitted. The general condition is very good - new Old Stock condition.  BTH Part number is 37A CX52849/1 .   It looks like it was a common fit on the AG4 and GA4 magneto. Please check the pictures on this listing as it forms a large part of the description for this item. It seems that these genuine parts are starting to get rare.  If you have any questions, I would do my best to answer them.