Need help IDing Austrian(?) musketoon(?)

[Anzac15]

I've just come into a firearm that I definitely need help identifying..its Austrian I believe, with a Liege proofed barrel. Unit marked.Beyond that I don't know. I've never seen one like it, and can find nothing like it online. Any help is greatly appreciated!

Information

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[Anzac15]

Lorenz Jaeger?

[Anzac15]

I may have found what it is..a Lorenz Dornstutzen?

[browningautorifle]

What a neat little piece. Very interesting rear sight.

[Anzac15]

I'm thinking jaegerstutzen now.

[Patrick Chadwick]

I've always fancied one of those, for the finely adjustable quadrant sight.

If the backsight block is marked up to 1000 (Schritt, not metres!) then it is the " k.k Jägerstutzen M/54".
If the backsight block is marked up to 1200 (Schritt, not metres!) then it is the " k.k Dornstutzen M/54".

Otherwise, about the only difference is the presence of the "dorn" = pillar. With a pillar, it must be the Dornstutzen. But, since the pillar may have been removed at a later date, the absence of a pillar does not prove that it is the Jaeger.

Hence the need to check the scale on the backsight block!

[Patrick Chadwick]

It looks like a Jaegerstutzen. The Dornstutzen has a longer support block beneath the sliding quadrant.

Described in the book "Die Hand- und Faustfeuerwaffen der Habsburgischen Heere" as Variation "B" with the ramrod lying in a slot behind the ramrod pipe.

The lockplate, dated (1)860, confirms that this is a later version. However, the ramrod pipe is mounted further back than on the example shown in the book (dated 1861). Transitional model/upgrade/repair?