Nurses 15 Second Pulse timer

A nurses pulse timer dating to around the First World War period
It consists of the glass egg timer calibrated for 15 seconds within a base metal protective cover.This has a small attachment to the lid allowing it to fixed to a chain and worn from the belt.
Prior to the availability of cheap watches this would have been part of the Nurses basic equipment fro recording observations.Length 75mm

Code: 50459