Please help need to know what these hallmarks are

[Yeese10121]

Need help determining the hallmarks on this brooch
One looks like a pitch fork or triton and under it a number like “585” maybe the next one looks like maybe a “3” or “m” in a circle and the last one looks like a “NB”

 

[stracci2000]

This pin appears to be hand crafted, not molded.
I don't recognize the other marks, but "585" is a European mark meaning 14k gold.
Without seeing the pin mechanism, I'd guess the style is 1940s-1960s.

 

[OoohShiny]

The first symbol could be a harp, in the style of classical statues?