Jordan, value may depend on a few things we don't know from the photo. For example, is it stamped model 42? Or are you calling it that because eventually the Cenntenniel Airweight became the 42?... Does the serial number on the box correspond to the serial of the gun?...how are the bore and chambers? .....

Maybe a couple of more photos,many answers to some of these questions would help the experts here (no, I'm not one!) to give you an approximate value. Partly this will depend on where you live.

Are you aware that this exact model you have is one of the James Bond guns? Issued to Bond at the same time he got his more famous Walther PPK!! (In the book "Dr. No). Things like this might have some effect on value, or at least serve as a selling point.

Best Eegards, Les

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SWCA 3084, SWHF 495, PGCA 3064