[TowerTalk] Need help in Identifying a Radio Works Line Isolator

[Bill]

I tried writing the company but no response. Can anyone help?

I have a Line Isolator from an SK estate, and while I know it is an 
older Radio Works I can't tell for sure what it is. It has the 
dimensions of the B4-2K.

I can read "CW BEAM 80(?) Special" ...I think it says on the label with 
a phone number of 804 484-0140.. The Serial number looks to be 942011.

I tried the site and it looks just like their B4-2K series it has 
different numbers.

Does anyone have one with similar wording? Is it a B4-2K or is it from 
one of their antennas?

Bill W2CQ