Bb Tenor
Manufacturer: Max Keilwerth
Model/Stencil Name: Globe
Serial #: 2320
Finish: Nickel plated
Source: mdek88 on eBay.de

Notice that this Globe tenor is keyed to only low B, yet still keyed to high F. To date I can count on 1 hand the number of MK horns that I have seen with such a limited key range.