Average GPS coordinates for El Letrero Postcode location: 18.958, -102.083. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). El Letrero on map:

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Listing cities & postcodes (1):
>> Michoacan De Ocampo, 61794 El Letrero, Mugica, GPS coordinates: 18.9583,-102.0833