This same “phony-Godzilla” costume was also employed for the final scene in The Terror of Mechagodzilla when Godzilla wades off into the ocean. Another publicity Godzilla suit (which appeared to be smiling) was employed in Cosmic Monster, in the scene when Godzilla appears in the ocean off Okinawa.
The images below were captured from the newest Criterion Blu-ray, found online, and scanned in from books. Some of the images may have been modified to see the textures more easily.