I'm considering a vintage V&C with a cal. P454/5C movement, and have some of questions for the experts.
First, what was the difference between the 454/5B and 454/5C movements? I've checked the auction sites, etc., but can't find a clear, consistent distinction. I imagine that any differences were minor, but would be grateful for any insights.
Secondly, this particular movement has a swan-neck regulator. Would that be correct for the 454/5C? My understanding is that the 454/B movements were inconsistent in this regards, so I'm wondering if it would have been the same for the /C version.
Finally, below the gold stamp on the case is the number 41. What does that signify?
Thank you very much in advance for any help which you might be able to provide!