Cuervo & Sobrinos was not a brand as far as I know. It was a retailer in Havana. Historically, it sold a number of Swiss brands and occasionally put its name on the dial in addition to the Swiss manufacturer, in the manner of many other retailers. It was the sole importer (UNicos Importadores) for only one or two brands - Longines and Roskopf I think, but I may be wrong. There is a very complete post about them on one of the Spanish watch fora - can't find it right now, but would appreciate a link if anyone knows it.
The name was co-opted for a new luxury brand in the 1990s - glitzy and over the top, not to my taste. I think a lot of sellers of junk watches just slap the name on the dial hoping for profit by association.
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