Here' s an Orioles card I'm glad I picked up many years ago. It's the 1956 Hocus Focus of Hal Smith. For those unfamiliar with the set, they are small cards (1" x 1.5") that you could develop yourself as the wrapper demonstrates.
Hal Smith was the only Orioles of the 18 baseball subjects. Smith was also in the 1955 set that contained 23 baseball players. The only difference I know of is that Smith is #17 in 1955 and #15 in the 1956 set.
Here's a scan of the 1956 card along with the wrapper (not mine)
1956 Topps Hocus Focus.jpg 151718Pack19659.jpg