I got these at Edmund's surplus store maybe 15 years ago. They were likely for a projector or enlarger and could be used for a do it yourself Rich Field Scope. The largest has a 3.75" aperture and a 14" focal length. another has a 2.25" aperture and a14" focal length and the smallest is 2" apereture and 6.5" focal length. Glass is clean and clear in all of them and the barrels are in great shape with the midle size showing just a few tiny marks in the black surface.
Asking $25 for the big one and $15 each for the smaller ones plus postage. All three for $45 plus shipping.