In brief re Indian locks - Avoid.
Slightly less briefly, they are making locks today in the same manner, with the same tools and materials as locks they made a 100 years ago. So an Indian lock could be 100 years ago, or made yesterday. Added to which the quality and finish is generally average or poor so personally I don’t think they are worth collecting anyway.
Good British locks are another matter. Words of advice - never buy any padlock that has been taken apart and where possible avoid locks without original key(s).