Ricoh Solar
1981, solar powered and augmented by a 1.5 battery. Needs what Ricoh calls a battery S (rechargeable) to do that though. Works with  2 SR or LR 44 button cells. Auto or manual exposure, depth of field preview, timed exposures down to 16 secs. auto hold, multiple exposures, removeable back, exposure compensation etc. P/Kr mount gives access to a wide range of lenses and accessories.

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