In September 1905, the Postal Museum purchased the painting “Personenpost auf den Kanarischen Inseln” (Personal Mail in the Canary Islands), which he completed during the aforementioned study trip.
Antoine enjoyed some special privileges in Berlin and was even allowed to use his office as his studio. From his office, he had a view of the Trinity Church (Dreifaltigkeitskirche, also known as Schleiermacherkirche) located at Mauerstrasse, which he painted throughout all seasons and times of the day. The Postal Museum tasked him with the illustration of numerous subjects which were then exhibited at the museum. Among those were his paintings “Ein Hochzeitspaar im Wagen” (Newlyweds in a Vehicle, 1897) and “Augsburger Boten Peter Derffus und Gottfried Thanner” (Augsburg Mail Carriers Peter Derffuss and Gottfried Thanner, 1898).