Triservice Version of the Oxford Miniature Vaporiser (OMV Fifty)
Produced for the three armed forces for Field Anaesthetists in the 1970s. Two vaporisers were used in series, one for halothane and one for trilene. Worked well in the Falklands War (personal communication). easily maintained and fairly resistant to temperature effects, having a heat sink of antifreeze in the base.

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