[time-nuts] OT- R&K devices?

[d.seiter at comcast.net]

I'm drawing a blank on a blank on a pile of R&K devices I just found in a few boxes I had forgotten about.  They look like relays or filters (2x4 pin, non-hermetic metal case, 10x10x20mm), internally it looks like an active device with a balun on both sides under silicone.  I remember R&K, but I can't find any info on the web. I have about 70 of them in different flavors. 

Any leads?  -Dave