SOLD Block ID

[ybshore@aol.com]

What do I have here with the 'RL' designation? TY

 

[ybshore@aol.com]

Here is photo:

 

[detmatt]

Don’t know what the RL is or if all the ‘64 413/426 blocks had that cast on them?

 

[ybshore@aol.com]

Don’t know what the RL is or if all the ‘64 413/426 blocks had that cast on them?

Basic block ID for the 413 but the 'RL' is *not*?