Here's some more info on the short sawback. These bayonets are usually referred to as Feuerschutzpolizei bayonets so in my mind, they straddle the fence between Feuerwehr and Polizei blades. Typically they're scarce to find but all seem to follow a pattern of unplated KS98 hilt, plain or sawback blade which are usually 20cm, black steel painted KS98 scabbard, copper Polizei sword style grip emblem pinned to the obverse grip plate and either WKC marked or unmarked.
Ron Weinand and Gary Walker show an unmarked example with plain long blade on page 131 of "Clamshells & other German Bayonets". George Wheeler also shows an example on page 121 of "Seitengewehr" that's WKC marked on a short blade that's also a sawback. I believe Tom Johnson shows this style bayonet several times in his original series of "Collecting the Edged Weapons of the 3R".
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