c.1935 Self-Balancing with two-tone bell
This horn has a couple of interesting features. First off,
bell flare is a different material (red brass) than the the tail
(yellow brass). Olds later used this sort of "two-tone" arrangement on
their Studio and Special models. Then there's the tuning slide - the
straight legs of the crook are very long, likely an indication that
this horn was originally intended to be a high pitch/low pitch
instrument. If that was the case, the high pitch slide is long gone.
The bell is 8" in diameter and the slide bore is .485"/.500".
The bell does not have a serial number - it's only marked "8 LM".As for
the slide markings, the bore designation (M) is clear,
but the first two
(of four) digits
of the serial number aren't really readable - I think it's an 8 and a
5, but I'm far from certain. An 85xx serial number would place the horn
sometime around 1935.
If you look carefully, you'll notice that there are areas at both ends
of each outer slide tube that have been spot laquered. When I got this
horn, the crook ends of both tubes had significant red rot - I actually
put my thumbnail through the tube wall just trying to scrape off some
crusty stuff stuck to the slide. Rather than try to find a set of
replacement tubes, I took a cue from tuning-in-slide horns and had
Bruce Belo cut the corroded ends off and then compensate for the lost
length by adjusting the oversleeves on the other ends of the tubes.. It
actually turned out pretty well, though the slide does tend to bind a
bit out in 7th position.