There are minor differences in the circuit boards, apparently the biggest outward difference is that the LEDs on one are regular domed 5mm LEDs, and the other uses LEDs that are flat with the front of the enclosure. Thanks, Jonathan On Thu, Aug 30, 2018 at 4:53 PM Evan Koblentz via vcf-midatlantic < vcf-midatlantic@lists.vcfed.org> wrote:
Hmm. That's weird, I knew it as part #9750, so I searched for that term. Did not know to search for #70455, which apparently is the same exact thing: https://www.bricklink.com/v2/catalog/catalogitem.page?P=70455#T=C&C=11.
I figured it out. I was going by the set #, not the part #. Sets contain multiple parts, of course. The part number is 70288 for the 1986 version and 70455 for the 1987 version. What's the difference between the versions? I have no idea.