624-21560 Rear main seal, used in the DWS Lister Petter engines. This is a 2 part seal kit.
The DWS model engine was also used in the SDMO T25C2M, T30U, and the TM30 line of generators, and in the Armstrong ALPW 30 generators.
This will be item number 8 in the Lister Petter drawing,
