I recently found the Remington Mark II as a compromise since I have not been able to find a Torpedo 18B at a decent price and they are mechanically identical.

I consider Valentines 'designer' typewriters, and generally overrated. If you want to write on an Olivetti, I'd go for the Lettera 22/32/DL. The Valentine is based on the Lettera 32, so the mechanical part is solid, but the Valentine is not as well-balanced as the 32. And about ten times more expensive.

I would note that the Tippa S continued under Royal/Litton through the late 70’s in the form of the late Royal Sahara: https://typewriterdatabase.com/Royal.Sahara.72.bmys and Royal Caravan: https://typewriterdatabase.com/Royal.Caravan.72.bmys (Made in Holland)

Olivetti Lettera 31 (Another name for the Dora -- or is it the opposite?) olivetti Dora (the actual base model if I'm not mistaken, with a bunch of rebrands worldwide) ETON (naturally this belongs on this list, I've even seen 2 others for sale online since) Underwood 315 (rebrand) Montgomery Ward Escort 33 (rebrand) Olivetti Underwood 310 (pretty sure this is a rebrand too, or at least very closely related) Olivetti Index (this is the closest thing I've found to my ETON branded one. It s PRACTICALLY the same in every regard - seen two online for sale) Montgomery ward escort 44 (also a rebrand of the DORA?!) Mercedes Super T (rebrand as well, seen one for sale) Montomery Ward Escort 77 (pretty close to being the same model again again... But not quite?) Neckermann BRILLANT Special T (DEFINITELY a rebrand. The manual is a dead give-away among other things) JUPITER (A typewriter 100% identical to the IDEX or ETON, but rebranded again again) Underwood 314 (no idea on this one. I gave up at this point)

Olivetti Dora, Lettera 31, Underwood 310, or in Sweden also branded ”NK Futura” for Nordiska Kompaniet, but it’s the exact same machine.

Significant brand equity