hi

i quote:
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"Only the first version had a red dot that showed when the calculator was on. It also had a raised spot on the "5" key. The serial number was on the back between the rubber feet. The serial number on these starts with 1143A.

The second version looked like the first but omitted the red dot. Early samples of this version still had a raised spot on the "5" key. The serial number was moved inside the battery compartment. Some of these also have serial numbers starting with 1143A."
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i have a '35 which is neither... no red dot, but serial number is between the feet. of course, serial of 1143A.

i think it is special... i think it is a red dot at the very tail end of that production run, and as the "red dot" top plates ran out, someone on the production line grabbed a new "top plate" from the coming run of second version. but the serial was placed as this was a red dot run.

i bet this '35 is near unique.
dana

Is the rear label intact (never been opened)? Do you have a dated sales receipt?

It's not unique, I've got one exactly like that too. It appears to be all original labeling and has the early ROM bugs. Serial number: 1143A (in small type) 29273.