Old Colt 38 special Police revolver,info needed

[Toecutter]

What year produced,cycles great,tight lock up,ex. bore.There is a dark spot on frame looks like some kind of stain or marker?Should I try and remove it or leave it alone?Probably why it was 300.00 out the door.Its not rust or pitting.I like these old colts,was thinking 50s era ,probably would have some stories to tell.Anyway loaded on the night stand it will still stop the bad guy,thats what it was made for!

[MAP]

I'm not a revolver guy (with exception of Peacemakers and blackpowder) but I've always like these. Not too big, not too small with great proportions.

[Toecutter]

Thanks Map!I did a search and these were made 1927-1969,this one 1950.They appeared in over a hundred movies and tv shows.Bonny&Clyde,Green Mile,Untouchables,Serpico,FBI to name a few,Barney had one on the Andy Griffith show but was only allowed one bullet!ha