CD 100 SURGE / TM. REQ.PAT.PEND. // BABSON BROS. CO. / CHICAGO.U.S.A. -- VVNM, pin appears to be new old stock in excellent condition! -- $25 plus actual postage

NOTE: I'm selling these insulators on behalf of the Jim Fielding estate -- PayPal (no fee friends and family) or checks are both now accepted - I'll provide instructions. I'll also be handling all the packing and mailing.