Amazing collection of photos colorized by Nathan Howland who has colorized images of the Horten V2 and V3 for me. 100% of the proceeds (other than US shipping which is included) will go to the conservation and attachment of the wings of the Horten 229 V3 now on display at The Smithsonian Air & Space Udvar-Hazy Center. Contact Nathan Howland via Facebook to cantract with him to colorize your own photos: https://www.facebook.com/HowdiColour/
And, yes, I highly recommend him. See 4 sample mages from the book below.