NOS manifold vacuum gauge. Tested and working. Got the fittings and vacuum line today.
Although it is Niehoff branded, it appears identical to the Stewart Warner one that was selling back then. Probably about 45-55 years old. With luck it will install into the dash-hole meant for the clock (I hope, the hole might be slightly too big (
that’s what she said) currently covered by a factory blanking plate so I don’t know.
Also got this cool badge: