M50134 - 7 (DMBS) + M56090 - 3 (DTCL)
The diagrams for all three batches have clearly re-used a standard Class 101 tracing, the underframe layout is clearly wrong and shows the 150 hp engined variant. Overlaying the three DMBS images on top of one another it can be seen they are identical (including the text) apart from number and cab changes.
In addition the the van door arrangement is wrong for batches one and two as the later type is shown, the inward opening door would be on the left on both sides as you face the van doors from outside.
The DMBS was to BR Diagram 520 and the DTCL to BR Diagram 628.
Note the top lamps are missing from the cab views.
The DMBS was DQ 214 and the DTCL DS 312:
Courtesy of Mike Jones. A letter that accompanied the images, mailed from one company employee to another in April 1957, notes: "...some of them you will you will probably chuck out as they are not really of very great interest. You will note that one some of the shots of the engine there are certain oil leaks showing and it might be better not to let anynoe see these photographs...".
These were probably taken at Met-Camm's Saltley works, and an almost completed 59051 in image WMP7810 dates them to around October 1956, when that vehicle was delivered. I've added my own notes on what they show:
The first two, DZ161 and DZ162, are of M50135 and M56091 were probably taken on a test run in the Birmingham area (anyone recognise the location?). The third, DZ163, shows the cab of M50134.
Details about the preserved Class 111 vehicle can be found here.
Many of the works photos are courtesy of the Kevin Dowd Collection.