S-W gauge identification?

I picked up some Stewart-Warner gauges at the local flea market, and would like to know the approximate vintage. Thanks fellers

 

The amp and pressure are Standard series, and they looked like that from the later 50's through 2000 or so. The water temp is a Deluxe series, and looked like that from 1958 to the 80's. Both kinds are still produced today, and look very much like yours with just a few minor revisions.

Look for ink stamped numbers on the back, and reference the date chart on Roadsters.com to get the exact month and year.

 

Thanks Alchemy, you [always] da man!