The photos on this site come from various sources, including the old wiki and eBay, and in some cases may not be as large or as clear as we would like. If you have better photos from your own collection, feel free to replace the existing ones.
Click on the photo and the following dialog will pop up. Select More Info the upper right-hand corner.
On the next page, underneath the image, select the File History tab. Then click on "Upload a new version of this file".
Click on Choose File and navigate to the file on your computer.
Click on Upload file at the bottom of the page.