This is a vintage Sahli Haemaglobinometer made by Crista of Hawksley in London and sold by Robert Whitelaw Ltd from Newcastle Upon Tyne, England. It appears to have been used as there are blood stains over much of the equipment.
The equipment is not in great condition most of the glass items are broken and the top of the Bakelite ‘stand’ has come off (this could be repaired easily by gluing). I know nothing about medicine so I don’t know which parts do what or whether any parts are missing. The rubber parts of the equipment have perished and have gone brittle and hard over the years. This apparatus appears to have been used as there is what appears to be blood on some of the items. The original needles are encased in a glass tube with stains to the inside. The instructions are included and are in wonderful condition.
This is an interesting medical item from the Victorian/Edwardian period and would be great for a medical collection.
The Science museum has some information about it: http://www.sciencemuseum.org.uk/broughttolife/objects/display?id=92228