MOST passenger car 413's built prior to 1965 were stamped "41" but there were exceptions (300 letter series engines, Max Wedges, etc.)

The year is the letter, the rest is the date code

V=1964 production model year
41=413 cubic inch engine
5-15 is May 15th 1964 assembly date
The carburetor number (3615) is a standard issue 1964 413 unit

I agree with the other poster, it was likely "born" turquoise and was painted orange later in it's life.