The materials brought together and readied in the machine shop have now reached the seat assembly department. All car producers bought in parts, ranging from nuts and bolts through special fasteners to in some cases quite major items. The spring mattress and possibly the wooden frame may well have been made to order by one of the many specialist firms which grew up around the main manufacturers. Note the clips holding the turned over edge and the two leather twists holding the mattress to the frame. The leather twists would, one suspects, have been made from the off cuts in the leather cutting shop.
In our second picture the seat squab meets up with the seat back, complete with centre arm rest, and the side cushion.For this vehicle contrasting piping had clearly been specified which adds luxury to the appearance. The back seat of an Armstrong Siddeley 346 was a very comfortable place in which to travel