roysboystoys Posted July 28, 2021 Share Posted July 28, 2021 I have this compound vacuum / pressure gauge that seems to match a 1924 Packard housing. The gauge looks like it's always been in the housing. The " retard" means it has a damping system , so the gauge doesn't fluctuate. Any one recognize it and know it's use in a 20's vehicle? Thanks Roy Link to comment Share on other sites More sharing options...
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