To the OP: Let me get in line - if you find you have not ruined it and don't want to deal with breaking it in, I'll buy it. My wife saw mine when I brought it home from the bike swap, and immediately said "wow, is that for meeeee?" so I should be looking for one for her. Somehow she loved the shape immediately - perhaps if it looks like sculpture, she knows it will fit her.

We have a few Selects. My wife's B17 has a shape that she loved instantly, and therefore banished me from putting my saddle on my bike. Hence it became hers! I Proofided it once when maybe 300 miles had gone by, and again a year later, maybe up to 1500 miles (she's been doing 40 mile rides several times a week. Another one has gone on her second road bike after Proofiding - comfortable but she doesn't ride it very much. I have a Swallow Select bought for the tandem - in about 4 hours of indoor testing it is starting to give under my sitbones, so that is good - also Proofided once. I'll Proofide the Pro when I'm going to take it outdoors.

I have a used Pro Select in very good condition. It was a bit tacky on the surface, but hard and stiff - I guess it had been Snowsealed, which contains rubber of some sort. I haven't ridden on it yet, I need another deep-setback seatpost. But I have Proofided it and it feels less wooden and has a little resilient give. The surface texture seemed to open up a bit, too. My guess is about 1980. I'm kinda saving it or the Swallow for my 1952 Rudge Aero Special - a Swallow would be period-correct, but the Pro is a bit wider - competition style with a little more old guy comfort.

My Pro shows me something - even if a Brooks saddle has not been ridden for a while, it benefits from gentle Proofide treatment. I apply it in one thin coat on the outside, just with my fingers, then just let it absorb. Then ride - that's it. I totally agree that a softened Brooks saddle is a lost saddle - usually the leather has lost strength and will not maintain its shape, hence not support your butt properly. As well, Brooks says to only adjust the nose screw rarely and in small increments. I don't know why they even put in an adjustment. When I tried to improve a bad one by adjustment, the sitbone areas became lower than the central ridge all the way back to the cantle, and the saddle was an irreparable ass hatchet.

I also have some Obenauf's. I use it on a Rivet and on leather straps, et cetera. I think it was @65Clubman who said Ob would harden leather. But the Head Rivetress recommends Obenauf's for the saddles she designed and sells, and mine has not hardened. I also haven't seen hardening yet on the straps, but I have on a leather desk coaster that gets coffee on it all the time. I'm not going to take chances on potentially collectible saddles, like the Selects.