This is a Casa Lambretta product.

Rear frame side panel spring retaining plate, clip & fixing set (PAIR) for Lambretta series 3 (’62-’68) by Casa Lambretta.

Item nos. 1, 6, 7, 8, 9, 10 on the diagram.

Innocenti part nos. 19955081, 19955083, 19955082, 7130522, 8310005, 72060005.