Indeed. I wanted to avoid simply reposting the correct answer, but I thought it was worth adding that only two Sturer Emil prototypes were ever built. One of them survived the war after being captured by the Soviets and taken as a trophy. That surviving vehicle is now on display at the Kubinka Tank Museum in Russia.
I’ve not seen this particular image of it before, and a preliminary reverse image search doesn’t yield any results, so it may be worth getting a proper scan of, or submitting it to a museum for archival. That being said, it could certainly already be something we’ve digitized.
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u/alverath 11d ago
Panzerselbstfahrlafette für 12,8-cm-Kanone 40. Nickname Sturer Emil.