Schultz arrived at the mint at exactly the right moment. Germany's coinage was about to be redesigned, and the job landed on the new man's bench.
German numismatic sources credit him with the new imperial eagle introduced on the 10 and 20 Mark gold from 1890 and on the 1-to-5 Mark silver from 1891 — the bird German dealers call the großer Adler, the "large eagle", with its smaller crowned breast shield. Numista's catalogue independently names him as designer and engraver of that type-2 eagle on the 1 Mark, struck 1891–1916. It is the single most-reproduced piece of design in the Kaiserreich: hundreds of millions of coins, six mints, twenty-five years, every German state's small silver.
And it is emblematic of what a mint engraver actually does. Nobody remembers the eagle as his the way they remember Brenner's Lincoln. It was never meant to be memorable. It was meant to be unmistakable at arm's length, in a dim shop, in a hurry — a state emblem that reads instantly and never tires the eye. Schultz built a piece of visual infrastructure, and the measure of his success is that it disappeared into everyday life.
Then there is the other thing. In 1892 the South African Republic — the Transvaal, under President Paul Kruger — ordered its first national coinage. It had no mint of its own, so the dies were cut in Berlin, and Schultz cut them. His obverse die for the 1 Penny survives in the Berlin Münzkabinett, 41.1 mm of steel with the engraver's mark scratched round the edge: OS in ligature, 23.3.92. BERLIN. On its face, a bearded bust of Kruger facing right.
The republic fell to the British in 1902. The coinage died with it. And then, in 1967, South Africa launched a one-ounce gold bullion coin and reached back seventy-five years for a portrait — Schultz's Kruger. The Krugerrand went on to become the most widely held gold coin in the world. A Berlin mint official who never saw Africa drew a face that is still being struck, in the millions, more than a century after his death. He is, as the Münzkabinett dryly notes, remembered in South Africa for it far better than he is at home.
His portrait work in Germany ran to the ceremonial: the 2 and 5 Mark for the 1904 marriage of Grand Duke Friedrich Franz IV of Mecklenburg-Schwerin to Princess Alexandra, the 1903 Saxe-Weimar-Eisenach 5 Mark for Wilhelm Ernst's wedding, a 20 Mark for Anhalt-Dessau. Alongside the coins came medals — the 1895 opening of the Kiel Canal (Nord-Ostsee-Kanal), the Siemens & Halske jubilee, the bicentenary of Potsdam's Huguenot church. Numista's artist file runs to 76 pieces.