New member with a question

[rprosperi]

(04-08-2020 06:29 AM)Massimo Gnerucci Wrote:  

(04-08-2020 12:30 AM)rprosperi Wrote:  Could well be!

s/n that start with 0000A... or 9999A.... were used for NFS prototypes and test units (internal, key volume customers and vendors (e.g. manuals and 3rd part books)).

My 17C has no serial # on its clear bottom case.

Don't believe I've seen a 17C. Can you post a photo of the top of the unit? Did you get this back in the day, and if so do you know much about its provenance?