In reply to Hi, may I know what means the by Endriu1981
In reply to Hi Andrea- I don't think we by Geoff Baker
In reply to Hi, may I know what means the by Endriu1981
The delta mark (triangle) means a transitionary period starting late 1963 and ending early 1964, It was a change in the lip of the bezel that the dial rests against when the movement is installed in the bezel, The change was to a much larger bezel lip which prevented the dial from dishing more and pushing past the lip...
http://accutronfacts.freeforums.net/thread/354/delta-triangle-cases-finally-means
In reply to There are a few things wrong… by Astronaut M2
In reply to How can we tell that the… by mybulova_admin
In reply to By the serial number that… by Astronaut M2
The Swiss made cases have serial numbers that start with a number and a dash like these...
https://i.postimg.cc/hGZH4NcH/a.jpg
https://i.postimg.cc/dVBbpLXQ/b.jpg
And the USA cases have serial numbers that start with a letter like these...
https://i.postimg.cc/W41BvsLG/c.jpg
https://i.postimg.cc/85Fx7wCs/d.jpg
In reply to The Swiss made cases have… by Astronaut M2