I've purchased another F frame Moulton (deluxe) and I need to actually put a seat on it (and add new tyres, cables and chain...) to be able to ride it.

I'm going to get a Brooks because my backside likes them. I'll be keeping the standard Moulton bars so will have a more upright seating position.

What Brooks would be best; B17/B17 Imperial or a B66? I don't really need the springs of a B66 but I'm not sure that a B17 will be wide enough for the upright seat position.

I run a B17 on my mini-velo fixed gear but it has a riding position more akin to a regular road bike but slightly more cramped.

Fellow Moultoners/R20 riders what saddles are you using on your Moultons and R20s?

The "B68" is a newer saddle same as the B66 without springs. You might consider a B17S (Women's) which is a tiny bit wider than a B17.

B17 here. Since the Moulton has full suspension, saddle springs aren't going to add much, except weight.