Vincent Bach – Tuning Slide Variations
Tuning Slide – Wrap
The master tuning slide crook in the early 50’s was made wider on later instruments made in the Mt. Vernon shop after approximately 1955. This difference is about 0.25 inch.
Note how the tuning slide entry into the 3rd valve goes down at an angle. Newer Bach tuning slides go “straight” into the 3rd valve.
Also it is very interesting to see the change in the wrap during time with early Vincent Bach trumpets. Also, note the relative position of the spit valve and drain with respect to the main tuning slide. Here are some great examples:
If you are looking for the original style concept tuning slide crook, you should look into Dave’s classic tuning slide here.
Tuning Slide – 1st Valve Slide / Saddle
“The first slide was changed to the reversed construction in the mid 1970’s. It was done because the old style had to have an extension arm made to solder on the 1st slide tuning crook. By reversing the slide tubes, the slide action was greatly improved and (2) by eliminating the soldering of the hook to the slide crook, it helped the response of notes associated with that valve.”
from Tedd Waggoner (Vincent Bach Brass Product Manager)
The first valve saddle became standard in the 1970’s. Before that time, this was an option.
Tuning Slide – 3rd Valve Stop Rod
Before 1940, the stop rod bracing was hexagonal in shape. Here are good examples of this style from a pre 1940’s Bach. Mt. Vernon Bach’s had the stop rod guide facing the 3rd valve. Sometime in the mid-late 1960’s (1967 example shows this facing the bell), the stop rod was reversed to face the bell. We are looking for additional examples to narrow down this serial number range.