Conn Sousaphone recognition guide
Here is a little table I made to help me identify Conn sousaphones based on the bell and valve configuration. I think I have most models in there. This table does include bell up model sousaphones, but not helicons. This table does not list high pitch models.
| Conn sousaphone recognition guide | ||
| Bell diameter (inches) | 3 valves | 4 valves |
|---|---|---|
| 20" | 18K | 20K |
| 22" | 34K | 36K |
| 23" (1920's, check your serial number) |
26K (Eb) | 28K (Eb) |
| 24" (1920's, check your serial number) |
38K, 42K | 40K, 44K |
| 24" | 14K, 21K, 26K (Eb), 32K | - |
| 24" Fiberglass | 36K | - |
| 26" | 10K, 20K, 38K | - |
| 26" Fiberglass | 22K | - |
| 28" | 46K | 48K |