Can anybody tell me about this lens?

[Shootar401]

This lens came on a Speed Graphic I just picked up. I know nothing about it and info online is scarce. Can anyone fill in the blanks?

[Amedeus]

Looks like a lens from a projector or an enlarger

[Andrew]

it looks like a variation of a tessar but I'd be happy for someone to correct me !
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[Jim Jones]

The lens was made in 1945. The 1943 Kodak Lenses booklet says it was used on the 5x7 Eastman Auto-focus enlarger. As Andrew says, it is probably a Tessar formula. It should be a decent macro lens on the Speed Graphic, although with less contrast than later coated lenses.