After WW1, the PV&T & LT&L grabbed a handful of the russian decapods that had been orphaned because of the revolution, and very soon after that the TdM ordered a lighter-weight version for some of their lightly built branches & industrial trackage.

The LT&L’s russian decapods all survived until dieselisation, while most of the TdM’s lighter-weight copies vanished as the branches they operated on were either abandoned or rebuilt to handle heavier locomotives (at dieselisation, only #305 survived, because the TdM’s Rawdon branch didn’t have enough traffic to make rebuilding the line to support bigger locomotives cost-effective, but too much traffic to just abandon it.)

When dieselisation was inevitable, the TdM chose #305 (#361 after merger renumbering) for the historical fleet, and when the replacement RS4-10 arrived it steamed across the river and dropped its (officially) last revenue fire at the museum site in Saint-Constant.

It survives today, mainly as an exhibit at the Saint-Constant shed, but still occasionally operating in passenger and/or freight service.