Is this a column wheel?

[morningtundra]

Having got great answers to previous questions, I can't help but feel egged on to ask a few more.

If this is irksome to anyone monitoring this somewhat sleepy forum, I apologize...

I finally opened this rather lovely but grubby Pierce chrono to have a peer at the movement.



Is that a column wheel I'm looking at? Or something else entirely?

If it is, I would have expected to see it at around the 6 o'clock position... but this is my only up-down chrono and wondering if the movement is just oriented differently?