The flyer is incorrect - there's video of a real machine here:

Also received this via form one mamedev.org:

Hello:

Years ago I sent Pierpaolo Prazzoli pictures of an original Enigma II correctly wired up according to the schematics available online. The pictures were of the game playing on my pcb test setup using a real arcade monitor. The colors did not match the current colors that mame was displaying for this game at that time, but they were correct and made sense. Besides the invaders being green now, the energy bar at the bottom of the screen on my monitor was: Green on the right side for full or high energy, Yellow in the middle for medium level and Red on the left side for low energy. So the driver was changed in MAME .90 to reflect my finding while testing this pcb.

However a very short time later some one had a "better" idea to make the game look like it did on it's flyer, which didn't make much sense as allot of flyers from that era were drawn by hand. Please view the enclosed video link of an actual Enigma II game in action and consider correcting the colors again to match.

Video here:

Also for your consideration a video showing the game Panther at time 5:18 in the video showing the back ground color being black. Some actual screen shots from the game on KLOV as well: https://www.arcade-museum.com/game_detail.php?game_id=10814

Thank you for your time and efforts.