Is this bezel insert a MK5.1?

[BeingAndTime]

Hi all,

I was wondering if the bezel insert on this 5513 is a MK5.1 since the upper left of the 4 is missing? If so, this bezel insert would be a later replacement if the watch has a 1968 serial number? It is my understanding the MK5.1 is an early to mid 70s bezel insert. Thanks so much for your insights.

[one80]

Yes, a 5.1 insert would be later - around 72-80.
It's not uncommon that inserts would be replaced during a service however, if damaged or scratched etc.

[BeingAndTime]

Originally Posted by one80

Yes, a 5.1 insert would be later - around 72-80.
It's not uncommon that inserts would be replaced during a service however, if damaged or scratched etc.

Thank you so much for the reply. This bezel does indeed look like a MK5.1 to you?

[Dan S]

It looks like the lume pip has a runny nose.

[BeingAndTime]

Originally Posted by Dan S

It looks like the lume pip has a runny nose.

Haha, yea it got replaced not too long ago.