Flip
·You've just said it yourself - it appears in ads of the time. So we know it happened, just not how often, hence my use of the word "occasional". Whilst few would dispute that the decagonal crown was the standard, several Constellations with the clover crown have been posted here over the years. Unless they were all serviced by the same watchmaker, it seems an odd coincidence that so many watchmakers should have run short of the decagonal crown and chosen to fit this one instead of the approved service replacement. Until more information becomes available, If the condition of the crown matches the watch it is realistic to assume that it may be original to it.
Taking this into account and given the extreme difficulty of sourcing an original decagonal crown, I would leave it on it if were mine. The OP can of course do whatever he wants with his watch. I am simply pointing out that the crown might be the one it came with.
I instantly thought the crown had been replaced but if it were mine I’d be more concerned about changing the strap 😁 Sorry OP, beautiful watch, just lovely 😀
