We have a nice Sopwith Triplane at our local museum but I'm not sure of it's history.
Yeah, I think there are two in Canadia, unless someone's snuck one in since, but both are post WW2 reproductions. I think one of them, perhaps the one in Ottawa used to fly; it was built by an American guy in the 60s and was flown for a period by the museum.
This next Monino bird was as common as they come in Soviet and even post-Soviet Russia; the An-24 twin turboprop feederliner. Over 1,000 of these workhorses were built in the late 50s/early 60s in a multitude of variants, of which there are believed to be around 100 still operating around the world. And that's not including Chinese production as the Y7, the basic airframe is still being upgraded with new engines and avionics. There's life in the old girl yet.
Antonov An-24 Coke
Another rarity at Monino is this BMW 003 copy powered MiG-9 jet fighter, of which, out of 610 built, only three survive. It was a promising idea; twin engined, light and nimble, but suffering engine flame outs as a result of gun gas ingestion into the intake.
Mikoyan Guryevich MiG-9 I-301 Fargo