Kitchen Aid mixer. Solid, simple design aimed at repairing it.
I’m pretty sure that can’t be said for newer models I’m afraid – they changed to plastic gears and apparently no longer lasts anything like as well.
As the Dualit toaster has already been mentioned I’ll go with my Hobart N50 mixer.
It’s basically a KA mixer but on a huge dose of steroids complete with bigger motor and steel gears (made by the same company originally before KA was split away from Hobart).
I bought mine about 8 years ago for £250 and the same era mixers are now being offered for £1500 (£3500 new!!).
It will outlive me and probably whichever of my daughters inherits it!!