meaning of the 2 cypher on this shoulderboard

[esu]

Hello All,
Im guessing a sub unit within Pioneers but would it be a company, division, regiment etc? Any info, order of battle etc anyone might have on the specific unit would be great.

Thank You, Cory

[harryamb2]

whoops.

[esu]

Hmmm, do you think a photo would have helped???? See what happens when you rush, sorry about that,
Cory

[bigmacglenn]

Quite sure that's regimental...
cheers, Glenn

[esu]

Thank You,,,