For sale a Genuine Refurbished BTH Magneto distributor cap with Terminals fitted. There are some signs of use, including a small section around one terminal that is broken away, this should not affect operation in any way. The general condition is very good - almost new 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.