The company Halbach Gebrüder, Stahlwarenfabrik (widely known by its trademark BULLDOG) was based in Solingen-Ohligs-Weyer. While its exact founding year remains undocumented, the firm was significantly active during the 1930s. It specialized in the manufacture of high-quality edged weapons, with a primary focus on SA service daggers (Sturmabteilung) [M1933], operating firmly within the tradition of Solingen as the German blade production center.
Halbach Gebrüder manufactured an estimated total of approximately 1,000 SA service daggers. This extremely limited production run grants these historical pieces an exceptional rarity rating of 4.5/5 (highly rare) among military antiques collectors. These daggers feature premium solid nickel-silver fittings and bear the iconic etched blade motto "Alles für Deutschland". Crossguards are historically documented with distribution markings to SA groups (Gau): Ho (Hochland) and Nrh (Niederrhein).
The highly distinctive trademark of Halbach Gebrüder is iconic in the collector scene, typically featuring the text "BULLDOG Solingen" or "Halbach Gebr. Solingen" in clear, stretched lettering. This is frequently accompanied by a stylized bull or dog motif etched directly onto the blade. This design, conveying quality and precision, makes their products easily recognizable today. Surviving examples represent a significant and scarce chapter of Solingen's blade industry, making them excellent reference pieces for any comprehensive blank weapons encyclopedia.