I've got two Deere 9250 hoes. One came OEM on my 300B (1972 vintage). Has one conventional swing cylinder - not two. Has some odd-ball see-saw type linkage that tends to be the weak link of the setup.
As I recall, the 9250 has a single conventional swing cylinder and the 9250A has two.
Also - in regard to the Deere hoes with the unitized "barrel" swing cylinder. Deere had offered kits at one time to upgrade them to dual conventional cylinders. I had to install a few. A lot of work and I suspect was barely worth it on a fairly new hoe. But I was a Deere dealer grease-monkey and did as asked.