5C/1712 relay and Dunmore 635072B electric motors

I’m hoping someone can tell me what aircraft types (but most specifically would have been out here in New Zealand in the 1940s-early 1950s) used the following two pieces of electrical equipment that I’ve acquired some amongst a package of materials from a chap who’s father purchased the stuff in the early post-war period (ie the “great” disposals of the wartime RNZAF fleets the last of which took place around 1957).

The first is AM relay type 5c/1712.

The second is a 24Volt DC 400 RPM 6.25Amp Dunmore 635072B electric motor/generator (American origin). These don’t appear to be engine accessory case mounted but have fittings to clamp to presumably tubular frames.

Thanks for any help.