El Canelo · Identification

Construction / ID tells

Place. León, Guanajuato on official and CICEG listings. Pair label wins.
Construction language. Lockstitcher and Goodyear welt on the CICEG card.
Documented number. Style 1780 is an eBay listing key, not a complete atlas.
Not Cuadra. Do not collapse unlabeled Mexican cowboy pairs into El Canelo.

Maker-specific markings guidance has not been documented yet. Preserve the complete stamp and compare it against dated sources.