: While "Dolly 22" isn't a standard model name like the Chapman or Fisher dollies, 1980s filmmaking relied heavily on wheeled carts for smooth horizontal movements.
The most specific reference to "Dolly 22" in technical documentation relates to spare parts for high-pressure washers and pumps. Dolly 22 (1980s) PDF
If you are looking for a camera dolly guide, "22" often refers to the track width or a specific model version. : While "Dolly 22" isn't a standard model