Here are two less common CD 121 tolls -- actual postage additional:

CD 121 AM TEL & TEL CO (no periods) - nice sage green -- couple tiny base flakes & tiny ridge peck -- $45

CD 121 AM. TEL & TEL. Co. (heavy glass) -- green shade -- no issues -- $25

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.