Restoration Qs...Dove Tails

[d.j. moordigian]

Rusty Nelson and I were talking about the 2 screw "dove tails".
I know there are 2 styles,...here are the part numbers...
These numbers came from the Trim Book...from 1934..

1. B-76819-A
2. B-76819-B

The questions is;....what is the difference? When was the change?

Thanks,

BTW,...Ya, I know they start with "B",..but they are for "A's".