Originally Posted by
unworthy1
Bikes were often sold with just the rear changer and no FD, more common in '50s than later days. Haven't seen that particular Simplex DO before: is it a semi-vertical DO or just angled more than a typical horizontal would be? And are they a variant Nervex head lug or another brand?
Nice bike!!
Indeed, it seems that these Simplex drop-outs had a slightly bigger slant to them than the Campagnolo examples of that period. I wouldn't go as far as to call them semi-vertical.
I think [MENTION=333224]juvela[/MENTION] was spot-on with the lug identification: Nervex 48/161. Thanks for that.

About the fork crown, however, I'm less confident. There's a definite ridge on the top, and I've seen other JOCO examples with EKLA "Extra Light" crowns, so I suspect this might be an EKLA "H", rather than a Vagner.