The opposite side is marked Disneyland Park - 45 Years of Magic and © Disney.
Original retail price $12.00. Made in China.
The coin was issued in a blue velvet envelope (4" x 3") with the "Disneyland" graphic embossed in silver across the flap.
Inside is a smaller paper envelope...
...which contains the certificate of authenticity.
Images courtesy of 1937Fan at Whistle While We Blog.