I don't have MWO in front of me, so I'm wondering. would this be the correct dust cover for a 105.012-65 with a serial number 2400****?
And could a 105.012-65 with that serial come with a telemetry bezel?

 

Nope, this is a modern dust cover.

 

This Is my 145.012-67s antimagnetic cover which I believe to be original. I'm not sure about the telemeter bezel but think it's more likely that it was added later because DOT 90 bezels are so expensive that it was either sold separately or it was too expensive to replace prior to a sale.

 

Agree.

 

Have a look here.

https://omegaforums.net/threads/speedmaster-dust-cover-evolution.13504/

I think the alternative bezels were an option by '65.

Got a pic of the front of the watch?

Edit: mwo says these bezels were available from 1960/61. It doesnt specify when the transition from original to service bezels occurred.

 

I’m home now, and referencing MWO, I do see that the telemeter bezels were available as an option after 60/61.
The pictures I have of the front show a service dial, so I’m going to wait for pictures until what the owner says is the proper dial has been installed.
Movement looks clean, and the serial number is in the proper range.

 

The movement looks very good to my non-watchmaker eyes.......