Great minds think alike. I believe you could use the "optional upgrade" commercially available at a nominal fee though.
I know this is a double post in one day, but I can't pass up on an opportunity to show solidarity to the X-33 whenever one is posted. Like paedipod, yours could benefit from the optional equipment. Just sayin.
Had a lunch-time GTG with @Watch_n_Wrist and a fellow buddy today, so I wore many different watches today. I wore the Sub-Sea on the way there: Alex's family heirloom 5513 certainly looked almost as nice on my wrist as it does on his own: Some of the others:
check out the hallmarks, you should be able to figure out the year the case was made. The case looks English, 9K from the marks, a very "English"alloy, something to do with their taxation of precious metals I believe. The movement looks like an 1890s piece. The English watch making industry was drying up at this point, a lot of smaller "makers" were giving up production and fitting the new "machine made" swiss movements to their cases. As for @Mad Dog 's comment about movement shots.... its too late I've had my cow....