Dear RG,
Like you I am also VERY interested in this case purely from a legal point of view and I am also a BIG supporters of girls right (no, I am not a woman). I grew up with my cousin sisters who were given no share while my cousin brothers took everything and enjoying all to themselves... thus I had this THING against such practices and have always been supportive of folks who come forward to fight.... In your case the only thing against u is the existence of the will and if one of your brother supports you then you have a much higher chance of success in this case.... In addition, while a person is entitled to write a will of his liking but there are two things against this will:
1. It is a gainst public policy i.e pure discrimination (since it is not directed at specific individuals by name)
2. The law has changed since then and thus including the girls to the "will' should not violate the spirit of the will as such (since I am sure the will doesn't say that the girls are excluded, correct me if this is not the case).
and thus there is a chance that a higher court (you may fail at the lower court) might favor you... I will encourage you to fight even if not for the property but for your right... you may still give back the property to your brothers if you like but that doesn't mean u give up your right....
I will do some research and see if I we can find some precedence on this will stuff (if we find one then it is a slam dunk).... I will let you know if couple of days...
BYW, which city are you in? I am in Hyderabad.