That's interesting. I live close to Littlestown PA, its just over the line and it certainly looks the same as the PA vises. Have not seen a New York either but will certainly keep an eye out.
Note, the Littletown vises are just OK quality. I have broken a few over the years but keep using the same model because I have it bolted through a 3/8's plate and don't want to redrill the holes.