The Holton spawned its own fork of this development, and influenced the Meinl-Weston 2165 and its descendants. This became a production model in both C and Bb. The first of these was probably the Holton 345, which Holton made for Jacobs to use in the Holton-sponsored Chicago Symphony Brass Quintet, in the early 50's. Yorkophone: Any grand orchestra tuba made in the style of the York owned by Jacobs. NirschlYork: A copy of the first of the Yorks, based on measurements by Floyd Cooley during a rotation through the Chicago Symphony, made by Walter Nirschl starting maybe a couple of decades ago. Later, they made a production version, which they designated the HB-50. They developed a limited run of hand-made copies of that instrument based on those measurements.

Yorkbrunner: In 1978, Hirsbrunner measured, and then because of shipping damage, overhauled the second of the two York tubas that Jacobs owned. Yamayork: A Yamaha-made grand orchestral tuba made in the style of the York tuba owned by Arnold Jacobs and now owned by the Chicago Symphony. They were inspired by traditional York designs of 4/4 instruments, but it is a myth that they were made using the same tooling. The B&M-made instruments were marketed under the York Master label by Carl Fischer until the very early 70's. The B&M factory was later acquired by Walter Nirschl (in 1991).

They had a line of professional-grade instruments made in Europe, mainly (but not solely) by Boehm & Meinl. York Master: York Band Instrument Company was purchased in 1941 by Carl Fischer, who used the Grand Rapids factory only for student-line instruments after WWII (during the war, they made shell casings). The second instrument was sold to a school where it was later discovered and Jacobs acquired it. Donatelli sold it soon after to Jacobs, who was his student at Curtis. The instruments were first made at the request of Philip Donatelli, who was responding to a request from Leopold Stokowski, who was his conductor in the Philadelphia Orchestra, for a large, organ-like tuba. They made, in 1931, the instruments owned by Arnold Jacobs and now owned by the Chicago Symphony. York and Sons, York Band Instrument Company: Names for different periods of the same Grand Rapids factory.

The history is well-stated in a variety of places, but here's a quick summary:

Hirsbrunner tuba 392 b