Parts compatibility between hunter and open face PW movements?

[Piff]

I have a question about the physical differences between an open face pocket watch movement and a hunter style movement. Specifically, I'm wondering how interchangeable parts are between the two (I'm talking only about models of the same brand and model number here). I would assume that manufacturers would attempt to keep wheels and works as compatible (and therefore swappable) as possible, while modifying only plates/bridges? From the pictures I've seen, the only real difference I can spot is where the sub-second hand is located. I've been looking online for this answer, but am coming up with no real information. Has anyone already looked into this that can shed some light on this subject?

Regards.

Edited May 11, 2018 by Piff
typo in title

[oldhippy]

The simple answer is not many. I could go into detail but it would take ages. When you think about how many different caliber’s there are in watch movements, it’s a small % that are interchangeable.

Pocket watch movements interchangeability would be B/staffs and stems. I am talking here about English P/W. American P/W such as Waltham’s are different, many parts of the movement can be.

 

I hope that answers you question.

[Piff]

Thanks, oldhippy. It does help. I’m also researching as I go, so I’m accumulating knowledge. My specific need to know (regarding movements in hunter configuration vs. open-faced) is influenced by the fact that if components like spring barrels, balances, and train wheels are interchangeable between the two configurations (of the same brand and model, of course), then I can expand my search for parts for the movements that I have acquired. I want to eventually get to a point where I can repair these parts, not just replace; but replacement is the level I’m capable of right now.

I also do not plan on making runners into non-runners for the sake of my particular watches, but finding movements with good balances that still are missing pieces or don't run isn't proving as easy as I was expecting.

Regards.

Edited May 14, 2018 by Piff