No 3v's were made in Carlsbad, the American made units were made 15 miles inland, in San Marcos.
If you can't read the serial number it's probably Italian, sometimes they were a bit faint. As always, pictures are worth a thousand emails.
Jim Allen the CycleSmiths
Jack Gabus wrote:
> To all you Masifile's.
>
> What are key differentiators between an Italian 3V and one made in Carlsbad.
> The reason I'm asking I have 3V I came across in which I cannot make out the
> Serial number. Thanks in advance for the input.
>
> Jack (Not so know it all) Gabus
> Laguna Beach, CA
> jack@shermangabus.com