I did misspell Jena, thanks for the info guys. the lensboard fit right onto the "hulk" my 4x5 B&J Orbit Monorail. I was looking for a cheap portrait lens to do 3/4 portraits with the 4x5. Looks like I got it It cost me less than $50 with shipping via ebay. 1931 is cool, I have a restored 1931 woody Wagon