Bruce Collings
| Model | Bell | Slide | Gooseneck / Valve | Tuning Slide | Leadpipe |
|
R4F
|
Gold brass
|
Nickel silver
|
Hagmann valve, custom wrap
|
Red brass
|
5
|
|
R4
|
Red brass
|
Bronze
|
Yellow brass
|
Yellow brass
|
41B, 41BN
|