[Elecraft] Puzzling packages

[Ken G Kopp]

Hi Gang!

I have two anti-static bags from Elecraft, both labeled
"E850235 K3 Digital IO PCB Assm".

One package is marked in red pen "Old" and the board in the
package is marked "K103 REMOTE I/O MODULE Rev B".

The other package is labeled identically, except W/O the
handwritten "OLD". The board in this package is marked
"K103 REMOTE I/O MODULE Rev XD".

Can anyone shed light on what I have?  My K3 is old, S/N 56
but has been factory upgraded to what I think is as far as
possible ... a K3+(?).

Thanks for any help ...

73!

Ken Kopp - K0PP