Hot Rods Gauge age?

Can anybody tell me by these pictures the approximate age of these gauges.

 

More pics

 

If you can pull one out, this page will tell you EXACTLY the age.

http://www.roadsters.com/sw/

 

tach looks like it's the right age to go in my car, to replace my broken one.

 

I would think late 50s early 60s due to the bezel stamping on the smaller insturments

 

The engine oil and water temp I have no idea.
They look like tractor gauges.

 

The oil and temp are Rochester gauges. The company moved to Texas in 1958, so if it says NY then it's prior to '58. Also I'm thinking 60's or so on the S/W because of the 8k tach and the bezels.