There was a company called California Aquarium Design or just Aquarium Design, can't remember which, in the mid 80s to 90s that had that as one of their models. They sold a fair number of tanks on the west coast at the time. At the time about the only under gravel plate available for that tank was by Nectonics. I think that size tank was available through other producers but I don't think it was a standard size for All-Glass, which seemingly dominated the market at the time.