McKinley
·Not to pile on, but if you wanted to make Seamaster original, I believe the crown is wrong for that year as well. I believe it should be a clover crown from the mid to late '50's, but you should wait to hear from an expert. I am just a newbie, so I may be wrong. If you enjoyed it for 20 years, it will be the same watch you always loved tomorrow morning. Just wear and enjoy.
McK
McK