That was an idiotic remark on my part, apologies :-)
As Martin has rightly (if ironically) pointed out, machi okuri is part of o-suriage. I have adjusted my post, accordingly. Thanks, Martin
Again, my suspicion that this sword is saiha, is pure speculation, based on the colour of the nakago (or the sabi giwa, to be precise). I'd love to see the hamon - it looks dull in the pictures...
Then again - the red colour below the machi - this could be just some rusting under the habaki...