This is a brand new Pentax 5mm XO, the latest ortho from Pentax. It is new in the box and unused. I did not realize it was 1.25" barrel when I bought it and all my other orthos are .965", so I've decided to sell it and seek out the older 5mm SMC ortho which was in .965" These sell new for $340 almost everywhere.I wasn't able to get $300 for it so I am now asking $270 and I"ll pick up the shipping in the US. Of course I have the box, instructions, caps, etc. It's been out of the box twice, once to learn it was a 1.25", and a second time to take this picture.