Royal Canadian Engineers CEF GvR Cypher

[mad4thcef]

I am requiring a bit of clarification about the 2 badges posted here.

The badge on the left CDN Engrs MS.14 G.O 105/1902 or Charlton 70-1-1-6.

Listed on the CME museum website under Badges

Non Permanent Force Conception -1936 Worn during the CEF period

Permanent Force 1903-1904

The badge on the right Royal CDN Engrs MS.16 post 1910

GvR Cypher (King George 5) Who reigned from 1910 when his father King Edward VII died in 1910 until 1936.

My major point being was the badge with the cypher worn during the CEF period if not worn by all was it worn by some the 1914-1915 veterans.

Can anybody provide me with definative proof that it to was worn during WW1
personally I believe it was King George reigned through WW1.

Thanx in advance