This is a drone's-eye view of what I believe is a CD 163 glass insulator still doing its job. Seen near the intersection of N. Maple Ave. and E. Shields Ave. in Fresno CA. USA on 05-22-20.

(Edit 05-23-20): I've been told that it is most likely a CD 164; this was confirmed by examining the wire groove width more closely. Thanks go to D.L. for pointing this out.

(Edit 10-17-32): i've been told by Mike Gay that this is definitely a CD 163. Thanks, Mike!!! :-)