The British inititally received early M3s and officially called the entire M3/M5 light tank series "Stuarts". The crews called them "Honeys" because, unlike British armor of the day, they were extremely reliable and easy to work on (as in "a honey of a tank").
Here are production numbers:
M3: 5811 (500 diesel engined)
M3A1: 4621 (211 diesel ")
M3A2: all welded M3A1 (included in the above totals)
M3A3: 3427
Some of the early vehicles had riveted hulls and a flat sided riveted turret, later vehicles had a cast turret and welded hulls. The M5 was basically similar to the M3A3 but with twin V8 engine (Cadillacs). They skipped the M4 designation to avoid confusion with the Sherman.