These are from 1970s and earlier. Made in Britain. The klg the is the same as a champion A6YC and a NGK D9EA. You're bidding on a box of ten new old stock spark plugs. Make sure they fit your application. You're the expert. These fit various models of motorcycles and possibly other applications. It's up to you to make sure they will work for you. Look at the photos closely. You can see some very light rust from sitting on a shelf for the last 45 years.