The 833UH and 834UH have interchangeable clip blades. It is the exact same frame. Finding them like that with the other patterns blade is common. Back then, I think they even got packaged like that sometimes, if they ran out of blades. Towards the end of the Schrade shutdown, they put any blade on that would fit. No problem really, just the way it is. Pretty commonly found with the 33OT and 34OT too.