Mentor Goltz & Breutmann Mentor Stereo-Reflex

{"overview":"The Mentor Stereo-Reflex is a German-made twin-lens stereo plate camera, produced by Goltz & Breutmann of Dresden in the early 20th century. That single saleroom result indicates the model trades in the low-to-mid hundreds at wholesale auction level, but a clean, fully working example with original ground glass and intact bellows could realistically sell for more, while a parts-only body would fetch considerably less.","buying_guide":"Inspect both bellows for pinholes (twin-lens stereo bodies often have a partition that ages independently from the outer bellows), confirm both shutters fire and remain synchronised, and check the ground glass and reflex mirror for cracks or silvering loss.

Generated summary, 29 Apr 2026 — not checked by hand; prices on this page come from the sales, not from this text.