7 Steampunk old pressure gauges

Description

A collection of old pressure gauges from my toolbox bottom drawer.
Smith's 2-inch 150 PSI
Smith's 2-inch 400 PSI
Smith's 2-inch 4000 PSI
Murray 2-1/2 inch 500 PSI (from a manifold gauge set)
Unbranded 2-1/2 inch 200 PSI
Snap-On 3-1/2 inch tester gauge
3-1/2 inch Automatic transmission tester gauge (rusty-no glass)
They all worked when I salvaged them - but they have been in the "someday I'll need this" drawer for many years, so they're "as-is" now, just to be sure.
Thanks.