look inside the rear rim of the prop for other markings. You might see the diameter and pitch.
Post a pic also of the whole prop so that the condition can be determined.
You may need to resize your photos to get them to upload. There are various ways to do that but a cumbersome although effective one is to email them to yourself. When you do that, it will asks what size file you want to use, from small to full size. Pick small or medium. Then save those attachments in the received email and use for upload.