Hamilton Masonic Watch? Value, Production Year etc.

I was given this watch from my grandmother once I had become a Mason.  This Hamilton Masterpiece Masonic watch belonged to my grandpa while i was growing up.  After the death of my grandpa, I was given this watch to pass down in my family.  I have seen a few Hamilton Masonic Watches but not one like this. On the back it has engraved my  grandfathers intitials, lodge #, and 306 of 1000.  I was trying to find out a production year and value or any other useful info. about this great watch!?! Thanks.