Not a lot of pictures to work with; recovery vehicles just aren't sexy except to us old Ordnance folks ... I have DW, wreckers, TRV, etc, all in build queue.
Anyway, take a look at Allied-Axis Photo Journal Issue 3, which has bulk of issue on the DW. You might find the pictures of the tractor towing a Panther to be of interest. The one with Panther loaded is postwar placing Panther on target range ....
John
Oops; forgot The Military Machine, "Dragon Wagon" by Jochen Vollert which has lots of detail shots & following limits:
M15 trailer about 20,000 lb
M15A1 90,000 lb <<-- kit
M15A2 100,000 lb
Both refs are great. Another is TM 9-767 reprint which I got from Portrayal Press.