Why would a solotempo watch have TWO simultaneous second hands? Double reference could give a hint?

 

No, its because the watch is a franken watch.

 

please explain, I would like to understand why such movement gives function to two second hands

 

It doesn´t. One of them is a dummy

 

Hey, it's a UTS - Utterly Terrible Second second hand.

 

IOBC

Imaginary One Button Chrono?

 

The old split second timer

 

While we can't tell exactly what is inside the watch, the movement has parts from 2 different movements, at least. For example, this could have a cal 265 movement (which was designed with a center sweep hand) but some used a fourth wheel from another movement (like a cal 267) which had an extended pinion. I don't know if you would also need to replace the 4th wheel lower jewel, but the result would be a watch on which you can fit both a sweep and a sub seconds hands.

The watch did not leave the factory this way, so this is a "custom" creation made up of parts from different watches.

 

…… and they didn't even have the decency to synch the second hands.

 

So you really think they made the effort to make both second hand run?? Why, one may ask...

I think it´s a sweep sec calibre inside, and the sub second is a dummy

 

I think whoever put that together is a dummy.

 

I have seen one of these before. And if I remember correctly, it was as Joe says and
both hands worked. But definitely franken. I'll see if I can find it.

 

it certainly has %99.9 chances of being a frankie than a prototype, as there is no aesthetical nor functional reason to have a watch with two second hands and be unable to operate at least one of them. Let me take a look at the caliber. I m not informed about it, but thought that having double ref could have something to do. Also could be just a caseback with both stamps and period.

 

It is common to find 2 ref ## in Omega case backs as the case was used for both refs...

 

+1
I have observed the same! several other early refs but no Ranchero yet!

 

Omega archive extract would be really helpful here. Will try either to buy the watch or talk the owner into requesting. There is a thread on purists in which a double ref casebacked ranchero shows only a center second hand.

here is the thread
http://omega.watchprosite.com/show-forumpostf.classic/fi-677/pi-4430133/ti-690008/s-/

for those with no purist log in, here are the pics