Twisted Electrons Mega FM Synthesizer MK1 (YM2612 chips!) SN MFM 2293

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via this eBay listing

"The most hands-on FM synthesizer on the market. This is the original MK1 with two YM2612 voice chips (12 voices in total) taken from the legendary Sega Megadrive. The MKII models now available from retailers do not have these chips, and it makes a big difference.

BEAUTIFUL DIRT! Unlike many FM synthesizers that are very clean and digital, the vintage FM chips within MEGAfm have a very characterful tone, allowing a broad sound palette ranging from beautiful plucked strings to growling distorted basslines. The sounds feel almost organic and never static.

Excellent condition. Lightly used in a non-smoker studio — all faders, knobs, buttons, and LEDs work perfectly. No cosmetic issues."