Joe DiMaggio and Lefty O'Doul postcard...anyone know about this?

[balltrash]

Came across this interesting postcard and have not been able to find out anything about it online. Anyone know when or by whom it was issued? Rarity? Thank you for your input!

[Exhibitman]

I believe the image is from the 1951 post-season tour of Japan that O'Doul arranged. Here are Japanese cards from the tour:

http://photos.imageevent.com/exhibitman/frankleftyodoulcard/1951%20Japanese%20tour%20card.JPG

http://photos.imageevent.com/exhibitman/frankleftyodoulcard/1951%20OquDoul%20Japan%20Tour%20PC%201.JPG

This postcard-scorecard depicting Lefty and Japanese HOF manager Shunichi Amachi has a commemorative postmark dated 11/7/51 from Narumi Stadium, where the Seals played that day.

[balltrash]

I figured that was around the time period it would date from. Much appreciated.