From: James Redin
E-mail: james@dotpoint.com
According with the "Collector's Book to Pocket Calculators" (Guy Ball and Bruce Flamm) these model is "available in gold or silver tone, value $150 - 300).
I assume that if the CE button is defective, that would reduce its value but not significantly, since its functionality may not be the actual issue for a collector. But, of course, this is just a subjective opinion.
If you send me a picture I can post it at my Web site.
Regards,
James.