Originally Posted by bostontrevor
Indeed. Or at least sort of. I see the seat binder bolt up top, but I guess I don't see the bolt you allege is passing through the cluster. It just seems like a fastback cluster to me.
Anyhow, I hope you can find it in your heart to forgive my dumbassery.
No worries

It's like a fastback cluster... but where the seatstays attach they appear to be secured by a pin that passes thru them as well as an eyelet on the seat tube lug. That's just something I haven't seen before.