Mag Switch, Year Question

[Sikorsky]

I spent the morning freshening a couple mag switches. In reading previous threads, apparently the "A.C. TYPE A-7" is the later switch compared to the "AAF TYPE A7". To me the A.C. TYPE A-7 looks older. Does anybody know what year J3 these switches apply to? Perhaps the AAF was used in all of them. Perhaps not.

Furthermore, in the previous thread, somebody suggested this lacquer pen for the recessed letters in the mag switch.

http://www.brownells.com/gunsmith-t...te-lacquer-stik--sku517100002-7778-19660.aspx

Does anybody have experience with this?

Thanks,

Zach

 

[jimrice]

 

[Sikorsky]

 

[bob turner]

 

[JohnsonRyan]

 

[JohnsonRyan]

 

[jimrice]

 

[jimrice]

 

[Topp]

 

[JohnsonRyan]