I picked up an interesting card recently off of Ebay that I thought was a menko card but it's not. I'm not really sure what it is to be honest. Here's the front of it which was the image I saw on the auction listing:
That's Tetsuharu Kawakami of the Giants on the right and Fumio Fujimura of the Tigers on the left. I'm guessing that since there's a guy in a Swallows uniform in the background that this is from an All Star game. I'm pretty sure that the photo is from 1953 as that was the only year that the Giants wore that insignia on their hat and the Tigers started wearing that style uniform in 1953. If it is from 1953 then the Swallows player is Masaichi Kaneda as he was the only Kokutetsu player to make the CL All Star team that year.
The first thing that told me that this wasn't a menko card was that it's larger than a typical menko card from the 1950's - it's almost "standard" card size. It's also on much thinner stock than most menko cards are. The last thing was what the back looked like:
Needless to say this is not a typical menko card back. This photo shows Noboru Akiyama (standing) and Kiyoshi Doi (squatting) of the Taiyo Whales. The Whales wore these uniforms in 1955 and 1956 but neither player debuted with the team until 1956 so that narrows it down.
So I'm guessing that this is some sort of bromide card instead of a menko but I've never seen another bromide that has photos on both sides. It's also really weird that the photos are from three years apart although I guess it's not unheard of card makers from that era reusing older photos. I was able to digitally search the latest Vintage Guide from Engel but I didn't find a card meeting this description. I'm basically stumped on this one.