The frame's green! I thought so, but it's been hard to remember.
And the chainwheels are a wholly different shape from what I've been used to. Though the metal is only the nominal chainwheel---I've actually been riding on an agglomeration of hardened skag quite a bit tougher, I learn now I come to remove it, than steel. As it happens the skag-wheel had the same number of teeth as the original one, but that seems to be entirely fortuitous.