I Have A Picture That's Been Donated To Our Charity Shop, It's Signed By Jacob Knyff And Has The Higgins & Bowers Stamp On The Back, I Have Pictures Of It And Wondered If It Was Of Any Value?

[Dgardner]

The picture has British ships in battle, I am really not into history so can't say any more than that.

[ToraToraTora]

See Here: https://www.invaluable.com/artist/knyff-jacob-wmbtpyg38d/sold-at-auction-prices/

[wolf63]

Is it a print or (hopefully) an original? Try https://www.invaluable.com/artist/knyff-jacob-wmbtpyg38d/sold-at-auction-prices/
and ebay. Try just Googling it and selecting Google Images.

I have to value donated postcards for our charity shop and have found people on AB to be very helpful and patient.

[Mamyalynne]

Higgins & Bower come up a lot.

https://www.theanswerbank.co.uk/Society-and-Culture/People-and-Places/Question147258.html

[rowanwitch]

Certainly worth taking to a reputable auctioneer for a valuation even if it is only a signed print but if you have a gallery label on the back they may help you if they are still trading in terms of previous sale price and establishing provenance.