Handlebar switch - CEV screws
Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police models
The original screws for the CEV 169 handlebar switches (and CEV models other than the 169) are 4 mm × 0.7 mm × 30 mm slotted oval-head machine screws. The original diameter of the head is 6.1 mm, a size not readily available today. The best replacement I've found is a 4 mm × 0.7 mm × 30 mm Phillips oval-head machine screw, but with a head diameter of 7.25 mm. These fit and work very well, despite the differences from original. McMaster-Carr part number 90258A232 is an excellent source for a replacement.