HI and welcome to the forum.
Chester date letters were often sideways during the period which I think we are talking about but pictures (which you will have to upload to an online photo host) will allow confirmation. The following should help you: How to Add Images Posting Requirements https://postimages.org
(choose 'Share', then copy the 'Hotlink for forums' code) is recommended. Do not use Photobucket or Dropbox.
Please embed your images rather than posting links and remember to use the 'Preview' button before submitting your post. If your images don't show up there we won't be able to see them either.
For a quick summary see:viewtopic.php?f=61&t=37974&p=103282#p103282