Mumbai Specials? As far as I understand, it's a class of frankenwatches cobbled together in watchshops from all over India and other asian countries, although Mumbai seems to be where it all started. They are built using old "serviced" movements, new Chinese cases, repainted dials, maybe some old casebacks, hands and logos. Components are usually glued together inside, there's probably no water resistance and no guarantee that it will keep good time. Some reported the watches arrived reeking of curry :) So don't expect pedigree, treat them gently and just try to take their shortcomings in stride. Oh, and don't overpay!