Schmitz Type Cases – The Same, But Different

While cleaning up a new arrival I noticed something strange…
The case on the right in each photo is serial No. 14* and the case on the left is a 27*.
Spot the difference?
The 14* has a bearing at the 7 O’clock position under the bezel.
Actually another thought…this 14* Siffert came with a ’69 G/F bracelet with HLD end-pieces which match the case perfectly – no spearing your palm fitting them.