date code on door glass?

[midpack]

I was at a garage sale... literally a garage going out of business sale, and found a familiar looking door glass. i know it's for a fastback. and i think it's 65/66.
can anyone here edjumacate me on reading the date code on glass?

 

[RyanG85]

http://www.fomoco.org/Date Codes.htm

 

[midpack]

I ran across that. but the window has 4M on it... M would be the 13th month?

 

[crustycurmudgeon]

I is skipped. M is December.

 

[midpack]

OK, thanks Crusty!

now, anybody need a nice DS fastback window?

 

[kb3]

where are you located? I could use a back up if it was in really good condition.

 

[midpack]

I'm in MA.

 

[kb3]

Damn. Too far away! Shipping would cost a pretty penny