Frank Crosby was an early exponent of vertical retailing; designing, manufacturing and selling his own products first for his eponomous drapery store in Whangarei and later under the name, Reslau Frocks, which were sold in stores across New Zealand, including Jacqueline Gowns, a salon owned by his wife, Alice.
Frank opened Crosby’s, located on the corner of Bank and Cameron Streets in Whangarei, in 1919. He designed frocks and blouses and manufactured everything in-house, allowing him to keep his prices low. Advertisements in the The Northern Advocate promised: "For the latest creations in Evening Blouses, or a Dainty Afternoon Blouse of crepe de chine, silk or voile, and the cheap and neat Morning Blouses, can all be bought at Crosby’s at a price far below ordinary wholesale prices."