Thanks for improving the photos, ZacUK.
Jenny68, your coin is similar to the first one cited above, but differs in some details. Your coin shows more wear and is of a lower grade, though still an excellent coin. It might be from a different mint, which would affect the value. The first coin cited above sold for USD 495. My first guess for your coin might be around $300, if it's from the same mint. We'll need for someone with more experience in Ottoman coins than I have to make an appraisal.