Longines sport Chief sell where?

I have a Longines after my father. He got it on his 50'th burthday 1969.
I want to sell it. What is the best Place to sell it and what could it be Worth?

Welcome tegenfeldt, your dad had good taste as evidenced by the very nice looking Longines, sadly the open market won't raise more than $200 for you at best in current condition.

Perhaps you attach more personal value, if so you could have the crystal replaced and the movement serviced for about the same amount by a local watchmaker, then the Longines would provide you with many years of faithful service!

If you rather sell the big public auction website is an option, you have taken reasonable pictures, although you might want to let the movement wind down and take another picture without the very 60's psychedelic multi-color motion distortion 😀

Thank you for good advice