Mitsubishi R-35

The Mitsubishi R-35 is one of the thinnest files in the archive. It's filed under audio, but the research record has no confirmed technical specifications, no production years, no original price, and no design documentation. What survives is a near-miss. HiFI-Stereo (1990, p.190) lists a Mitsubishi "R352/MD" two-way speaker - an acoustic-suspension design with a 5-inch polypropylene woofer, a 1-inch soft-dome tweeter, a selector for four tonal balances, and a rated response of 100-20,000 Hz ±3 dB. The name is close to "R-35," but nothing in the surviving record confirms that the R-35 is that speaker, a variant, or an entirely different product.

If that's all there is, that's all there is — and the archive is better served by saying so plainly than by filling the gaps. If you have a physical R-35 or original paperwork, the record would genuinely benefit from it.