Its a King. Serial 33737, medium bore. Has a patent date on slide of may 17, 1910. P

[WHEELS39]

It's a King. Serial 33737, medium bore. Has a patent date on slide of may 17, 1910. P

Any history on this would be awesome. It's a King. Serial 33737, medium bore. Has a patent date on slide of may 17, 1910. Pics below

 

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[nhbenz]

Trombone piece from H.N.White seems to be what I find online.
http://www.all-brass-instruments.com/brass-16206-Antique-1910-KING-H-N-White-Silver-Trombone

 

[FreeBirdTim]

Just remember that patent dates are not a good way to date an item. I usually add at least 5 to 10 years to an item's patent date to guess on it's age. For example, a Coke bottle with a 1925 patent date is usually from 1930 or later.

 

[nhbenz]

This link has serial number listings, they seem to indicate 1910-15 for yours: H. N. White Serial Numbers for King Band Instruments