All Stuart pianos are custom-made by Piano Australia Pty Ltd, who also manage the sales and the service. With each handmade piano taking about a year to complete, output is small, and most of the instruments are built to order.

Production of Welmar upright pianos continued at the London factory until 2000, when the Whelpdale, Maxwell & Codd group- making pianos with the names Welmar, Knight, Bentley, Broadwood, and Marshall & Rose – merge with the Woodchester Piano Company to form the British Piano Manufacturing Company. Today all these pianos are produced in one of the most famous piano factories in England, Woodchester Mills near Stroud.

Dates and serial numbers when the pianos were manufactured