Solid state rectifier 6 or 12 volt and positive or negative ground.This is the correct replacement to fit this model.You will note that other sellers hide the part number on listings and sell for a lower price.What you will probably get from these similar looking rectifiers is a 58 pence KBPC 5010,the wrong type which might well leave you stranded later.The type i supply are the type sold by all leading parts suppliers.These have been in use for at least 30 years and also used on my own classic bikes.
You might like to save a little money and the scenery might be nice as you sit awaiting the recovery service when your cheap unit fails,or you can buy the correct one i sell.
Posted First class on day of sale including weekends in a padded envelope to avoid pin damage in the post.Unlimited supplies in stock ready to post.
I will include a drawing showing what each pin connects to on the rectifier.
THESE ARE FULL WAVE BRIDGE RECTIFIERS AND THE BEST AVAILABLE IN THE UK FOR MOTORCYCLE USE.

RoHS CERTIFIED PRODUCT
THOUSANDS SOLD DURING 19 YEARS SELLING THESE ON EBAY.
NOT THE RUBBISH ONES YOU MAY SEE WITH NO NUMBERS ON THE CASE.
BUY THE BEST FOR YOUR EXPENSIVE OLD BIKE.
I RIDE AND BUILD OLD BRITISH BIKES SINCE 1969