CD 253 KNOWLES CABLE / INSULATOR / "PATENTED JUNE 17 1890" -- Great dark "knowles" blue -- glass surface has a hazy sheen that I believe is factory -- only issue is a small base ping -- $135 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 accepted - I'll provide instructions. I'll also be handling all the packing and mailing.