Dear Steve
Thank you for this. So the Fave plates are a copy of the St Remy (1745) plates. This means this is the Brocard Carriage of 1740. Thius means we still do not know what the M1757 carriage looked like and whether it was the precursor to the Gribeauval 4-pdr carriage. I have not seen a drawing in St Remy of the 4-pdr Swedish Barrel.

It is a pity that the table of dimensions and plates are not properly reproduced.

Stephen