dshao1
373
The earliest versions of cal 453 and 454 from the 1940s did not have swan neck regulators
Hi, this can be all original. Besides not having swan neck micro-regulators, the early versions of these movements also did not have the movement number engraved on one of the bridges.
VXN indicates the movement was imported into the US, and cased by the AD/jeweler in the US. This was common for a period of time to avoid Customs/Import taxes for complete, gold watches entering the country.
The only way to be 100% sure is to send the watch to VC for inspection. Before that, you can send the movement and case serial numbers to a VC Concierge or Boutique to confirm the numbers match.