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It is a 6 size ladies Waltham model 1890 hunter Seaside J made about 1898. It is a 7 jewel, unadjusted pendant set watch. Very common as more than 237.000 were made of this variation. The case is a modest quality (but still attractive) gold filled, and from Philidelphia Watch Case Co.
It looks to be in nice condition, but you should have the movement serviced before using it.
Valuations are not done in this forum as explained in the sticky posts, but you can find many similar (7 jewel hunter 6 size) on ebay completed listings.
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