The brand R37 offers a Wagon coupling SVwf, in scale HO 1/87th under reference 43104 which has the following characteristics:
- Model under continuous current "2 rails".
- Model running for the railway SNCF during the IIIa period.
- Supplied with loop type coupling.
- Wagon"VB" Montluçon SVwf2 with registration number 252320.