As I saw the pictures of Demo's low S/N P'14 I started to grew the idea of a collection from low S/N guns .. well, hope you're going with that idea and share a lot of "low numbers".
Here's one from my side - a DWM Modelo Argentino 1909 with S/N A003:
https://www.milsurps.com/images/impo.../sn_1909-1.jpg
Regards,
Georg
PS: One doesn't have to get below the others number, just show us your earliest pieces!