"Safely dispose of it????" Calm down and take deep breath, my friend.
When you have a piece of history in your hands, especially when it's from a close family member like your POP who passed on, I'd rethink it ,if I was you. Once it's gone, ya can't get it back. Take it to the gunsmith and ask about it. DO NOT SELL IT, if he gives you a 'Deal'. Find out about the true worth of it, by doing research on the internet and closely looking at every centimeter of the gun for markings, etc. Markings can increase the value of a firearm highly. There are lots of sites on the 'puter that can aid you in your research. Have fun and learn all about that gun. Then do what you think is best for you. Goodluck!