induction spacers

[speedo]

I have a bunch of these spacers that I am told are for 912 (possibly 356) heads also.
Some have a port to pull vacuum, some not. I would like to know what they are worth and specific model application, and or if they are also a 356 part.
Thanks!

[peter leinberge]

Speedo, I believe with relative (98%) certainty that these are '68 912 emission parts.
Value? There's probably a 912 owner that will want them for a concours restoration.
Mostly folks threw them away.

[ejboyd5]

Looks as if the vacuum port has already been plugged on that spacer. Most of these were replaced with ones of a synthetic (phenolic resin) material to limit heat transfer from the engine to the carburetor.