Originally Posted by
hookemdevils22
You win: It's a
Regina Extra 12/18.

So, now that we have that settled, I assume that all those Shimanos you've posted no longer apply?
And going slightly off-topic, what can I do to give the brakes better feel? I've cleaned and lubed the calipers and added Kool Stop salmons, but they're not terribly confidence-inspiring. Perhaps new cables would help? The levers are
pre-91 Athenas, I believe.

Too bad it is not a Sachs (which I can easily re-gear to achieve a wider range).
I do have a limited supply of Regina sprockets. If you sent it my way I could give it a try to re-gear into a wider range. The trick is to use your existing spacers in order to maintain the correct indexing. I believe I could keep this all under the price of these gems:
$250
NOS Regina Extra Synchro 90 7 SP Freewheel 13-31 cogs Campagnolo Compatible ISO
$123
REGINA CX/CX-S Freewheel 7 speed 13.14.15.16.17.21.25. English Thread Italy 83
And probably even less then this one even with including a cleaning and servicing of the body.
$88
NOS Regina Extra SYNCHRO 90 S 14-28 7s freewheel Campagnolo index 7-speed