[R-390] R-390 antenna relays - what do I have here?

[frank hughes]

Hi,
While trying to organize things, I found two different antenna relays in
the spares pile for the R-390's.

The relay w/ two black coils looks like what I normally find in the R-390,
but the other little one
I have never seen installed before.

The single-coil relay mount points and antenna jacks are identical.
Did Collins have two versions of antenna relays for the R-390?

73
Frank
KJ4OLL

http://i180.photobucket.com/albums/x257/fish1_07/collins_mystery_tuner/R390_antenna_relays1_zps3b23d290.jpg

http://i180.photobucket.com/albums/x257/fish1_07/collins_mystery_tuner/R390_antenna_relays2_zpsd13e351d.jpg