Looking through all of my throwback cards I found this odd one. 1992 Fleer card of Carlton Fisk.
The player in the background has a #19 on the helmet, with only the #1 showing on the front of his jersey. This card should be showing pictures from the 1991 season. The Orioles player is wearing what looks like home throwback uniforms from 1966. There is a record of the Orioles wearing 1966 throwbacks on June 19th, 1991 against the Twins. Shown below are cards with this throwback jersey on.
From top left and across
The 1991 Orioles jersey, from the Game Used Guide, the Orioles script had an underline on it. So this jersey w/o the underline is likely the 1966 throwback. Similar font, but without the underline.
A few details from the above cards
The Orioles did have this combination in 1988; elastic waistbands, Orange/White/Black piping on pants, but the collar had thicker stripes that the Fisk card doesn't appear to show. I would think it would be odd for a 1992 card to show a picture from 1988 though. If this is from 1988 Larry Sheets wore number 19 and batted from the left side. They also used that same batting helmet in 1988.
The jersey Fisk has on does appear to be the 1987-1990 Road Jersey. Grey with the red outline of navy, and the numbers on the left leg. You can just make out the bottom left corner of the "2" next to his glove.
A mystery game from 1991 of the Orioles wearing their 1966 throwback uniforms against the White Sox is not as it initially appears. Fleer decided to use a minimum 3 year old picture to represent Carlton Fisk from the 1991 season.
Blog and curation of Throwback Baseball Games in MLB, along with the "Games-who-shalt-not-be-named" a.k.a. Turn Ahead the Clock.