Garden railway 16mm scale SM32 0-4-0 battery loco

0-4-0 battery electric loco, origin and age unknown. Uses 3x AA batteries for power. Looks like it has been in storage for some time before it came into my possession.
Three operating controls: on/off/charge, forward/stop/reverse, and variable speed. Bonnet is removable to access battery compartment.
32mm gauge, axles and wheels run freely. Tested and working, although chassis may need some attention. Generally good condition, although could do with some TLC, and would make an ideal basis for a kit-bash or project.
Size approx 12 x 10 x 8cm.