The original branch arms of Østgarðr were registered in 1979, and there were a couple of failed attempts to change them prior to passage of the current device in 1984.
Per bend sinister purpure and Or, a seahorse rampant azure, crined, unguled and finned Or, orbed sable, gorged of a laurel wreath vert, grasping in its hooves a laurel wreath Or.
The branch’s first arms were registered in August 1979. (View submitted image.)
Originally submitted as “per bend sinister purpure and Or, a seahorse sejant azure, crined, finned, tailed and hoofed of the second, engorged of a laurel wreath proper,” during the 1979 “Heraldicon” effort to clear a two-year backlog of submissions the blazon was updated and the wreath being held in its hooves was added in order to satisfy the requirement for a prominent laurel wreath in each branch’s arms.
These arms were not retained as a badge and were released in 1984 when the current device was registered.
Argent, a bend sinister Or fimbriated purpure, overall a sea-horse erect azure, crined, unglued and langued Or, gorged of a laurel wreath vert.
A change of device was returned in July 1981. (View submitted image.)
The return noted “The fimbriation should be wider. You will have to add a large laurel wreath, as in your current arms. It would be a better idea to gorge the sea-horse with an Or laurel wreath than a vert laurel wreath, since the beast is azure. The Or bend sinister has poor contrast.”
Argent, a seahorse erect azure, on a chief vert a laurel wreath elongated fesswise Or.
A second change of device was returned in December 1983. (The submitted image is missing from the archives, so I have guessed based on the blazon.)
The return noted “What is drawn on the chief is not a laurel wreath, but rather two laurel branches overlapped. Redraw as one or more standard palewise laurel wreaths. Three would look nice.”