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for this online database
I display images of certificates when correspondents contribute them or when I can find them among dealer listings. Anytime an image is available, a small image is displayed in the column you just clicked to reach this page.
My requirements for mid-resolution images are less stringent than those for high-resolution images. Whenever someone contributes a high-resolution image, I automatically make thumbnail and mid-resolution images that you see in the database.
I require high-resolution images to be at least 300 dpi (dots per inch = 118 dots per cm) which is roughly the resolution needed to read printers' names. If you cannot read printer names in your scans, increase the resolution to 400 dpi. I display mid-resolution images at 640 pixels wide. To preserve most details, most certificates used for mid-resolution display should be scanned at 200 dpi or higher.
Scanning suggestions. Want to learn more? I have a whole section of this website dedicated to scanning certificates.
I NOT need
Hints for scanning certificates too large for your scanner
How to send
I strongly recommend buying the Cox Catalog 3rd Edition from your favorite
If they do not carry, or are out of stock, you may buy directly from me. Simply click the buy button below.
Help support this free site! Please visit my eBay store called Papermental by Terry Cox. My inventory includes railroad passes, railroad ephemera, newspapers, magazines, engravings, and all sorts of paper collectibles.
Please contact me if you have certificates not yet listed. (See How You Can Help.)
I suggest using WeTransfer or similar file transfer sites when sending large files or large numbers of files.
PLEASE contact the many fine dealers listed on my dealers page to buy certificates.
© Copyright 2021 by Terry Cox