E. Anthony is on the opposite side of the address.I know he was a very early photographer and supplier of photographic chemicals. I have seen a cobalt E.Anthony with a 502 address and a smaller rectangular labeled one. Both bottles were non pontil.
I think there was a labeled E Anthony that indicated it was Varnish. I dont know if that was related to photography.
It appears to be a rare bottle.
http://www.daguerre.org/resource/anthony/anthony3.html
That's the E Anthony you are reffering to I assume. I'm not sure if its the same E Anthony that produced the bottle but its certainly possible.
Actually, I found this link...
http://www.boxcameras.com/anthcoll.html
So it seems to prove the camera guy did put out bottles of stuff.