I picked this up from a WUS member recently. There was a bit of confusion around what model I was after and I ended up with the wrong caseback opener. It owes me 30 usd. Would do a swap for a sherpa graph opener also. Will ship world wide.
I've recently inherited a sherpa graph which after searching information online I believe is a mk11b because it has a small T above the 12 sub denoting the change from rodium to tritium. This is also how I found this wonderful forum and being a bit of a watch nut have been enjoying lately so...