Military cap badge

[Scylax]

A friend has recently acquired a WW1 cap badge with a royal crown above,
a laurel wreath below encircling the central motif of an ankh with serpents twisting the lower shaft. It's reminiscent of an RAMC badge, but not quite.
The base of the badge contains the motto 'In God we Trust', in Latin.
Can anyone help with the identification of this unusual object ?

[woofgang]

Try US army?

[jackthehat]

Is it similar to these?

Royal Army Medical Corps...

http://www.google.co....l463l1220l2-2.1.1l4l0

[jackthehat]

Darn!

Just seen you said 'similar'..........

[ABerrant]

Upon formation of the RAF in 1918 the first issue of Medical Branch insignia incorporated the Ankh but with single serpent and a different motto...

http://www.britairfor.../xraf_medical_2nd.htm

[Scylax]

AB... that is a decided possibility. I hadn't thought of an early RAF badge.
From memory alone I can't swear that there are 2 serpents or one. The central
item is definitely not a caduceus, but a well defined ankh. The motto is also worn, but still readable as 'In God we Trust'....somewhat hackneyed, so maybe this was a prototype, later to be changed.
P.S. just spoken to the owner per telephone, who confirms the snake as a singular entity, coiling clockwise around the lower half of the ankh.
ABerrant, I think you've got it. Puzzle solved... I think. My gratitude.