I'm almost reluctant to divert the thread back from Hot Lips, but ...
Would the utility helicopter Bell 47 of 1946 also count as an old Warhorse?
It is also the world's first certificated helicopter. I'm very pleased that my one-and-only dual helicopter flight was in one. I loved it. When I win the lottery, I'm going to buy one, along with a hangar for it and the amphib Beaver!