First of all, gold plating is applied over silver plating, so what you have there is a brass neck with (probably factory) gold plate over silver, i.e., one of the standard finishes offered by most/all manufacturers at the time.
The engraving might have been done post manufacture, but I believe some mfrs' highest finish option included extensive engraving including the neck.
From the picture it could be Conn, Martin, Buescher, King, or even Selmer model 22/26. As noted, most Conns had the microtuner; but the very early ones didn't, plus there were special orders and many many variants. Your best bet is to pore over photos, checking things like the lengths of the key arm on either side of the pivot, the shape of the arm Note that the OP's shows the arm tapering in its height, whereas the Conn arm seems more constant in height down its length), the design of the little guide slot, post design (note OP's neck has a single-flange double post whereas the Conn neck shown uses two individual posts each with its own base), shape of the rim above the tenon (note that the Conn pictured is rounded whereas I think the OP picture looks more like a straight sided cone) and so on. Or, get it together with a variety of old altos and see which it fits.
I have always understood "New York neck" to be strictly a variant of the 6M, with a special long arm. In the Conn world this just looks like an ordinary Wonder/New Wonder/New Wonder II alto neck, except without microtuner. But it might not be a Conn neck at all, in fact the more I look at the differences between it and the Conn neck shown the more likely it seems that it's not a Conn neck.