those are totally Experto Crede lugs. (NOT spyder or swallow)

here's one on ebay with identical track ends and rear bridge
http://www.ebay.co.uk/itm/1958-Hetch...-/200646698807

you have to remember these were a lot of custom builds, not everything is going to "match up" because the buyer could pick whatever he wanted in terms of lugs, stays, fork crowns, etc.