Some Nxxxx rats. For the most part,( except for at least the N5895) the N series of rats were made special industrial users eg. railroad
N2949, 1/2 dr. no date code, has brads and not screws, has brass selector switch, has oil port in head, has post 40s logo that looks 60s. it is a hard one to date, my guess is 50s.
N2949A ? 1/2 dr. has what looks like a 87 date code, but nothing on this looks 87. There hare no factory markings on the rat, just the socket. Has brads for faceplate, has brass selector switch, has oil port, logo looks 40s. socket is bradded on. clearly a scaffold rat. my guess is 50s