You are right Steven, these are exacly the lugs on my Girardengo.
For those interested in some lugs and other frame building pieces, i uploaded the related pages of a 1959 "Schruba" catalogue to my gallery:
http://www.tourgallerie.de/
Martin Appel Munich, Germany
The Maaslands schrieb:
> The seatlug is a commonly available one that Bozzi even sold wholesale
> to all comers from the late 40's onward. The seatstays tabs of the lug
> are actually male plugs that fit into the stays, so you can often see a
> circular line around the stay about one half inch from the lug.
>
> Steven Maasland
> Moorestown, NJ
> USA