The company Robert Middeldorf GmbH (ROMIWERK), Stahlwarenfabrik was established in 1902 in Solingen. Boasting a long-standing history in steelware and cutlery craftsmanship, the firm originally specialized in general steel goods production before expanding its operations during the Third Reich era to include contract production of political edged weapons, with a primary focus on early SA service daggers (Sturmabteilung). Situated in Solingen, the manufacturer operated in the absolute center of German blade craft.
The factory never received an official RZM code, which limits its entire political dagger manufacturing strictly to the highly sought-after, early phase of NSDAP equipment. Robert Middeldorf manufactured an estimated total of only 1,000 SA service daggers. This extremely limited production run grants these historical pieces the highest possible rarity rating of 5/5 (extremely rare) among advanced military antiques collectors. These early-production pieces feature classic solid nickel-silver fittings and bear the iconic etched blade motto "Alles für Deutschland". Beyond political contracts, the factory's portfolio included standard domestic and commercial steel goods.
Detailed graphic documentation or historical records concerning a specific pictorial trademark or logo utilized by Robert Middeldorf have not been extensively preserved in standard reference archives, largely due to the extreme scarcity of surviving examples. Today, surviving products from this maker represent a pinnacle collectible within Solingen blade industry history, making them excellent reference examples for a comprehensive encyclopedia focused on blank weapons manufacturers.