ID old Mosler from SN ?

[CaptainMitch]

I am considering an old Mosler and having read a number of short articles online indicating that possibly
some models were to be avoided I am seeking some advice.

I wonder if someone could advise me based on the model number. The safe is being offered by a reputable Safe and Lock dealer who says he previously disassembled parts, inspected and lubricated. This safe has not been drilled or repaired.
Manufactured 1969.
Model 1612 CL Lock Model CF302

[MartinHewitt]

A 1612 from the 50s of which I have seen photos didn't look that sturdy. Do you have photos of this safe? If you are looking for a burglary safe in the US, then I suggest looking for TL rated safes. We had in another forum someone who looked for a gun safe and reviewed a few vintage safes. In the end he bought a really big TL-15 or TL-30 rated Mosler plate safe. Not easy to move, but extremely sturdy and a capacity of supplies for a full army.

[CaptainMitch]

Thank you for taking the time to help.

The safe in question was manufactured in 1969.
I have several photos but unable to make sense of instructions to attach photos.
There is a tag on the back side that indicates Model number is 12, SN 20690-17
There are two metal drawers inside affixed to the top, one drawer has a key lock (key present).

Sale price is $350 cash. Seller states it is also fire rated.
Based on these notes, is there anything further to your comments ?
If this safe isn't secure then it doesn't suit our need.
Again, thank you for your comments.