Early 12C calculator with blue display ???

[rippleinwater]

I picked up this odd looking 12C with a blue display. I’m not sure if this has an unusual display or if the display is just delaminated. The background is a local electronics recycler here is Boise got around 12 early 11Cs and this one 12C . All of the 11Cs were from 1981 and in excellent condition and were also all defective. I assume they were returns at one point to the HP facility in Boise. This 12C is not working. I’m just curious if this could be a prototype or experiment. I opened it up and the inside looks like any production calculator.