1957 D/d

[Pat]

My money is that this is either the Coneca RPM#003 or very similar.

1957D-1MM-003
| D/D/D SOUTH & EAST
CONECA: RPM#003 | Crawford: CRPM-002
Wexler: WRPM-001 | FS#: unlisted

Looking forward to your attributions.. :)

[Shingpumps]

Nice find!

[Brad]

Nice find. Here is a pic of mine to compare. This one is in my top 50 rpms.