Hi, the car seems period correct, the valve rocker arrangement dates it 1919 to 1923 The casting number on the block 37858 dates it 1919 to 1922 so 1923 is out the cowl shape indicates it is a 1921/22 If the vehicle has cowl lights on the side of the cowl or the remains of what they once were I would guess 1922 no cowl lights I would say 1921, The engine number if original would tell an exacting story and there would have been a little oval aluminium plate on the left side rear chassis horn wrap around , if that is still visible that would be of help it is definately in the 1921/22 year