Swan fans - I spotted a split lever for sale on ebay.
These are often sold assuming they are broken. I am 99% sure that it is fine and it is a split lever pen, given that it is a BHR with overlay and not all metal.
This one is engraved and has some plating loss. It would still make a nice example after a tiny polish and a sac. The nib needs a tiny bit of straightening on the side. No work that looks too difficult...
(I am a bit over my pen budget for the month and will only put in a pretty lowball bid.)