Battered screwheads

Just threw up my hands in despair and nipped out to the local garage. It took two men ten minutes to loosen the screw (eventually they hammered in a slightly larger allen key), but it's now out - and that means I'll be wearing these tonight!

But thanks for all the offers. I'll buy you a drink anyway if I see you at CM. (And if I make it to CM.)

are these the SIDI seconds, with the SIDI printed backwards?