Part number check

[bob40]

1688071.
For some reason I cant pin this one down.Thanks.

[mbstude]

Temp gauge (Radimeter) for 57-59 C Cab trucks. (Not sure about the later C Cabs).

[Skip Lackie]

I think Matt is mostly right. It's only correct for early 3E trucks, though it should fit all 3E-4E trucks. I assume it's the older style Bourdon tube type gauge. The later ones were electrical.

[Mark57]

Yup... ran into this switch last winter when I changed the instrument panel. According to the serial #'s in the 3E Parts book the switch happened around January/February 1957.