Look out for signs for "Valverde del Camino" - this is a town in Andalucia (Huelva) where many of the traditional boot companies have their factories. There is a label attached to boots made there (I'm on my 2nd pair!). In Andalucia most "traditional" (ie. not trendy/posh/Camper etc) shoe stores will have a range of Valverde boots.

You can take a look via this link- http://www.eurotradeinternet.com/industry/footwear/labor/labor1.htm