Bulova 1939 Chronograph

Chrono from me. Nice one!

Chrono

Same here, post it.

I'm thinking, for a few of the generic Chrono watch records, this name is functioning like a catch-all for a function- similar to set-o-matic and/or using the movement series names in accutron naming convention if we would have gone that route for the accutrons.  I'm fine with that- but think not all of the chronos were advertised by Bulova as that base model name.  Maybe I'm not remembering the chrono ads correctly?

I can't understand how this came to be dated to 1946.

The date mark is a shield for 1939 on the movement, just like on this example.

http://mb.nawcc.org/showthread.php?122452-Need-Bulova-10AH-Chronograph-Crown&p=940383&viewfull=1#post940383

Like the above example both have an import code stamped on the balance cock and 'Swiss' stamped on the barrel bridge. All other 10AH examples date to 1942 and are stamped "U.S.A." The reason for this is they were originally made in Switzerland pre-war, but the American Standard Watch Co. factory at Woodside  tooled up circa 1940 to produce this and other movements in the US because of export problems from Switzerland in wartime. See the article posted at the bottom of this thread to see the proof.

http://www.mybulova.com/forums/bulova-shares-info-sheet

Case SN may possibly be for 1936, but never 1946, that is seven years after the movement was made.

If you cannot see the datecode, it is positioned slightly above where fifth ringed a small mark on the previous page, and is half-hidden by the bottom end of the chrono actuator lever.

Here is a blow up of the other 1939 10AH linked above. You can now see that the chrono actuator is shorter, and does not hide either the date mark or the stem release screw. This means the part used in Josè's example is non-original, and has been made up to cope with the non-original crown.

OK 
I'm sold.  Do we just change date to 1939 based on movement symbol and note case SN beginning w/ 6??

This movt is all-Bulova, the smallest diameter production chronograph of any kind. It is a column wheel minute mod that I have seen before on pocket watches, but this one engages by swivelling the sweep pinion. The movt was only produced between 1939 and 1942.

Chronographs like this probably do have a name, and I do agree that we are lumping them all together. At the very least these types should be differentiated from the other chronographs by the 'single button' designation, or 'crown activated'.