S98 Bayonet With Smooth Grips?

[Spitace41]

Hi all. I have just returned from a trip to Lithuania and Latvia. I purchased this semi- relic S98 bayonet in Riga. I am wondering if anyone has any information on the grips as they are smooth and slightly rounded as opposed to ribbed and flat as is usually seen. Apart from some shrinkage they appear to fit quite well. I have seen similar grips on Polish used 1898/05 "Butcher" bayonets so maybe there is some connection there? Any opinions would be appreciated. Apologies for picture quality but I am having to borrow a camera at the moment. Many thanks.