Army signal corps came up with substantially the same idea. As late hagelin crypto the mid 1960s the Navy employed a version.
A”, there is no disk with two “A”s so the first disk is AB, then AC etc. Since there are 25 disks and 26 letters in the alphabet the last disk is AZ. Some instructions said to not select offsets that were close to the pt message. This aspect of the system makes it much harder to analyze than systems that have only a single choice. Variants Thomas Jefferson Wheel Cypher, 1790 or 1793.
The applet appears to be an M-94. This way the center 25 letters will always be overlapping. The order of the strips in the frame is how the key is set. Pier 45 at Fisherman’s Wharf S. CSP-1088 CSP-845 with CSP-488 compatible strip alphabet No.