Hi Feltwad,
you just mentioned that "Most of the original dies from Dixon and others went to India these flasks that came on the market in the 1960 which now are sold has originals and many collectors do not know the difference"
Thus it could extremly difficult or impossible to thus, it could be extremely difficult to impossible to differentiate whether the body of a powder flask is new or old. Riling Riling already wrote in his book to be careful: If the flask actually looks too good, it's probably a remake.
A lot of remakes made in India furthermore have an artificial patina that ultimately looks too homogeneous to be old.
For me it is mostly a "feeling", and no hard facts, but there are some indications for an antique flask.
1.) All screws are made if steel
2.) The top of the flask has been soldered together from individual parts and brass sheets, and not cast in one piece. This may be different for specimens from the 2nd half of the 19th century.
3.) The markings on the charger are straight and not angled
4.) the spring on the top looks different from replica powder flasks
To illustrate my observations here a few photos
(Sorry for the bad quality of the pics)
I ask for a critical discussion of my post. Thanks