Here's an Green tint CD 523 from Spain embossed 7/E.S.A. (front) 22 (Reverse). Measures 4" x 3". Matchhead flake and light scuff marks on reverse skirt and teeny tic mark on crown. The AV1 version of this insulator is the new (approx 1970) standardized version for Spain. This example predates this.

First email gets this Spanish insulator for the reduced price of only $10 plus 8.00 shipping. Thanks!