How old are these Sherwood Brut regulators/are they any good?

[BillN]

I recently picked up these regulators http://sdrv.ms/1gZhZ2a at a garage sale and have a few questions about them...

Does anyone know what the model numbers are (I can't find any numbers or letters on them)?
I'm guessing they are old from the style, but does anyone know how old they actually are?
Are they good regulators - is it worth spending the money to get them serviced?

 

[Scared Silly]

Early 90s if not just before so at least 20 years old. Sherwood make goods midline regs. Can still be serviced.

 

[Shcubasteve]

+ 1 still serviceable. Let's see the first stage. Look for a number starting with SRB. That will tell you the model.