In the first picture experimental shop,Early 1922 I suggest the car behind the V screen six has a rounded scuttle, a 200 mile race car perhaps. Maybe the pictures are not all the same date.
In the eleventh, chassis erecting four cylinder cars, the chassis in the foreground seems to be an early type where the side rails terminate at the rear spring mountings and a tubular cross member arches upwards and rearwards, all the other chassis have the longer side rails extending over the rear axle.
In the fourth picture, engine shop, the two crankshafts on the floor differ from the one on the bench above having a large circular piece in the centre but the one on the bench seems to have two counterbalance weights,is this a 1919/20 picture?
Notice the central heating radiators, all the comforts!