have you ever picked up any of chuck'ss catalog reproductions ?
http://www.velo-retro.com/list.html

this one might be handy for your area of interest:

!!! Legnano / Emilio Bozzi Catalog, 1950 -- 340 pages, parts and bikes from the manufacturer of Legnano, Perla and Wolsit bicycles. Beautiful steel plate engravings of Campagnolo, Ambrosio, Cinelli, REG, W.A., Simplex, Vittoria, Perry, Regina, Nisi, Fiamme, Binda, Martano, Pelissier, Christophe, Cornez, Universal, Bowden, Magistroni, F.B., Gnutti, Gaslo, Pirelli, Sheffield, Hutchinson, Superga, Delta, Silca, Bayliss Wiley, Brooks, Italia, Falck, Mannesmann, plus many lugs and fork crowns. Amazing document! Text in Italian. Three enlarged color scans of Legnano Mod. 54 Corsa, Legnano Mod. Roma Corsa and Legnano poster. Color cover. $ 45