How to tell the difference on cz3ds

[BC1969]

How to tell the difference on cz3d's

Hi so I just bought what I hope is a 1021 Los banos, cz3d. in looking at the serial sticker is there a way to tell for certain the unit was made at Los banos versus the ones made by First Texas products ? I have not picked it up yet, and only picture of the bottom says a 1021 serial with fisher research labs.
I've never seen in person, any newer fishers up close compared to my ancient 1265x which has a gold sticker that has the serial and other info.
I'm also confused about I read some cz3d's are analog and some are digital ? how will I know ?
reason I ask is because I plan on sending it to NASA Tom.. to tune/calibrate it, and he only tunes the analog units.

I can link to the auction that's closed now if needed so y'all can see the pics.
Thanks

Mike

 

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[DiggerinVA]

There is a white decal on bottom of housing....it will have seial number on it. Yours should start with 1021.... I have never heard of a digital cz. Digital machines usely have touchpads, pushbuttons and digital screens. Analog machines consist of knobs, flip switches and needle meters.

 

[mikefromIllinois]

Your safe all cz-3d's are analog.

 

[Sandman]

Analog, which is not a bad thing.