by clockmakers son / Uhrwerkmachers* Sohnemann - filius faber automatarii* Giovanni »Vanni« Losa
, form Erba
(weed), Como moved later in 60s to Vittuone, Milano
learned&worked under PSM
brazed Cinelli SC for nearly two decades from 1990-2008 but Tomi Serafino spotted Losa already back in the 80s in Cino s factory
brazed for Cicli Anselmo (since 1979 Loano, Savona Liguria), Graziano Battistini ('36-94') (ex corridore professionale), Bonfanti, Bruno Brazzo (Certosa di Pavia, PV - Lombardia), Cassani, Lucio Colzani (Merone, Como), Luigino Chiodini (former pro, comune Magenta di Milano, Lombardia), Ottavio Dazzan, Del Sante (Parma), Cicli Fartà (Bergamo), GiuPek Giuseppe Pecchenini (comune Parabiago di Milano), Paolo & Italo Guerciotti (Milano since 1954), Guarini, Lino, Pep Magni (Baggio, district of Milano), Magni ergamo di Chiorda..., Martinelli, Milesi, Mino, Cicli Monti (Dal 1935 a Baggio, district of Milano), Oliviero Morotti (since 1975a Nembro, Bergamo, former pro at Dreher for example), Cicli Mosconi (Padova), Natalini (Viterbo, Lazio), Pavarin (since 1974 Varese), Record * S, Santa Maria (Milano since 1972), Poretti, Priori (@Cremona, Lombardia), Ravasi, Stefanoni, Taldo, Terruzzi, Tunesi, Turconi, Turri, Uboldi Mario @ Baranzate MI, Cicli Zanazzi, Zini (recently found one, like late 80s early 90s zero lug filing *sob
) , Zoni!
In
: Krapf, Magni, Gody Schmutz, Weros Zürich (Werner Ott, @ Zürich-Seebach), Piero Zurino, Schneider!
In total 45 brands, cycle stores and or ex corridori porfessionali!!!! ufff 
*
https://www.dwds.de/wb/dwb/uhrwerkmacher
tahs what "they" say on the internet 
oder Angelo Picchio 
und seinem leicht alternierten Tretlagergehaeuse Motivs, angelehnt an »Pino« Pelà s »quattro fagioli« 
(Vier 
luv'it 
extra leggero OverSized
