Many are
1973-1981
Around $325-$350, depending on condition.
50-300 USD or so
Contact gunpartscorp through their website. They list these at $10.90 plus shipping.
5-130 USD or so
There is no way to give you an exact age. Hawes firearms serial number data is not in the public domain. Value is based on condition, finish, barrel length, grips, sights, etc.. Withou more information, the best estimate would be in the 25-175 USD range, give or take.
Depends on model and condition (we cannot tell either from a serial number) but could range from $100-$300.
No published sn data; 50-280 USD
50-230
Only way to know would be to research a collection of Hawes catalogs.
I do not believe there is a detailed serial number date list out there for Hawes, but it was most likely built in the late 60's or early 70's.