Yes, could be. About 1980 a mass of bayonets came in through Century I think, or Alan Lever...and there was everything. Those scabbards were available, all the variants of the 1907 bayonets after the long model, #7, #9 bayonets...the red and black handles. They were all pretty cheap and I had a few select blades for my collection at the time. The leather scabbards came in all lengths too, they'd been fitted long times back too. Not just a recent thing. So, Owen, maybe... I got an Owen bayonet just before selling off my #1 Mk3 and it had that same scabbard, was about new.