Mentor Goltz & Breutmann Mentor Stereo-Reflex
The Mentor Stereo-Reflex is a German-made twin-lens stereo plate camera, produced by Goltz & Breutmann of Dresden in the early 20th century. It was a specialist instrument aimed at photographers shooting paired images for stereoscopic viewing, sitting in the higher-end segment of the pre-war German plate-camera market.
With only one tracked UK auction hammer result on file — £360 in October 2019 — any sense of what a Mentor Stereo-Reflex is worth today rests on a very thin sample. 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.
Sales History
Prices shown are UK auction hammer results — the wholesale level achieved in the saleroom. Neither buyer’s nor seller’s commission is included. Dealer and retail asking prices are typically higher.
Prices updated: October 2019
| Date | Price | Source | |
|---|---|---|---|
| Oct 2019 | £360 | Flints Auctions | |
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Auction: Fine Photographica & Instruments of Science & Medicine (Lot 336) Title: A Mentor Goltz & Breutmann Mentor Stereo-Reflex Camera
Description:
1913-25, 9x18cm, with Thornton Pickard Cooke Anastigmat f/4.5 5" lenses, serial nos. 89588/89590, body, G-VG, shutter sticking, lacking ground glass |
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Frequently asked questions
What is a Mentor Stereo-Reflex worth today?
Based on the limited UK auction record available, a Mentor Stereo-Reflex sells for around £360 at hammer, though with only one tracked sale the true market value range is uncertain and condition will heavily influence price.
How much does a Mentor Stereo-Reflex sell for at auction?
The single recorded UK auction sale hammered at £360 in 2019; collectors should expect comparable examples to trade in that broad area, with premiums for working shutters and complete plate holders.
Is the Mentor Stereo-Reflex rare?
Tracked sales are scarce, which suggests the model appears infrequently at UK auction; this scarcity can support price but also makes establishing a reliable market value difficult.