Please refer here to Colin Owen under his Badge Section for No.1637.

This Collar is in MINT Condition and has 'Fold Over' lug fittings to the rear.
"Quartermaster's Comment":-   The design is interesting in that it covers the many areas which were given to the ladies to look after........Everything from Driving Ambulances to Passing on the Ammo!!!!
Michael tells me that this variant was worn around 1934 through to about 1954.