go to: marlinfirearms.com and pose the question to them Updated Answer - I believe you are probably talking about a Marlin model 39, not 59. Check here for much information about the model 39: http://en.wikipedia.org/wiki/Marlin_Model_Golden_39A Also as has been refernced above. Contacting Marlin Customer Service will help get the information you need.
50-150 USD
1880 marlin hex barrel
My Glenfield Model 25 has a micro-groove barrel,so I imagine others do as well.
50-200
What is the value of a Marlin Micro Groove Barrel MCD 336 Cal 30-30 WIN?"
It should be marked on the barrel if it has the Marlin micro groove rifling.The model 25m was made from 1989-2003.That being said it will if it was a early made rifle.
No
Depending on condition, $300-$450.
I would contact Marlin,s customer service dept.They may be reached through the internet.
Your Marlin model 783 was made in the year 1971.
Marlin Firearms is still in business. Check with them.(marlinfirearms.com)
200.00