If it states 6M, then it would be one of the last productions stating 6m

So 1962 would be the year. In order to not extend the serial numbers into the million spot, I would assume K06719 would actually mean 1,006,719, since serial number charts have the serial numbers for 6M ending just prior to the 1,000,000 mark.

My previous value comments remain the same.

Thanks a bunch, this helped so much!

I found a couple of Conn serial number charts that show K serial numbers were used in 1967.

Interesting post. My question concerning the serial number charts, does it look like K represents the million spot on the serial number? (1000 thousands is 1 million, so a K like 1000K) Conns machinery used 6 numerals for about 50 years, so tooling may have just been an expensive change to go into the million dollar spot. Like the odometer on my 1985 dodge van, back to 0 at 100,000 miles.

Also, does the serial number list refer to the K serials horns as a 6M? Or no designation of model?

I have never seen a 6M that has so many Conn director model features. This is an interesting example of how various new designs "bleed into" more than one model. The Legendary Tranny/True Chu Berry comes to mind as o historic example of the "bleed into" a new model example.

In other words, its an interesting horn. Value is more to collector geeks like myself more than a top notch musicians horn.

Hi saxwhisperer.  First off, the charts I looked at did not show any model types (6M or otherwise) by the serial ranges starting with letters.  Here is what is shown:

Series  Year

C        1964
E        1965
H        1966
K        1967
L        1968
M       1969
N       1970
P        1971
R        1972