Hi, if you read our forum rules you will see we cannot help value items here. This can be done by an auctioneer or your own research into sold examples after dating.
For help dating please can you take the photos in daylight, as the photo quality is too poor to make out the necessary details as they are at the moment.
I would recommend showing the whole boot so we can see the height and shape and how the leather strap and buckle are used. The boot I can see appears to be missing a pull loop on the inside leg (from the darker leather patch and stitch holes visible), the sort used with boot pull hooks.