PANEL-VENTS SERIES 1 FRAMEBREATHER
series one li 150 framebreather: up til which frame-n° did this model have vents in the sidepanels (like tv1) ?
According to Vittorio's book only early machines up to June '58 had them, so going by this sites info http://www.mmlambretta.com/serials/li-details.html roughly up to 510875.
thanks for the info !