Rex Lex wrote:
Thank you all very much for the quick responses! I thought it might be a Landeron 13, but Ranfft and other sites kept saying a Landeron 13 is a monopusher chronograph. I also found part of an old Landeron catalog, and it shows the Landeron 9, 11, and 13 movements as monopushers.
However, after more searching I learned that Heuer frequently used Landeron 13's that were two-pusher chronographs. So I'm guessing Heuer and other's (Breitling even?) must have used ebauche Landeron 13's modified for two-pushers at some point.
This page shows Landeron 13 as two pushers chrono...
https://www.time2tell.com/database/land ... on-1947-2/