WW1 Shoulder Sleeve Insignia ID

[Usa1918]

I posted this over in the WW1 section as well. Helping a friend and we have not been able to ID the following (Ive seen them before...but where?)

[Usa1918]

[Usa1918]

And finally 1st Army Railway Artillery Reserve?

[world war I nerd]

I'm pretty sure that they are:

 

First one - Ordnance Repair Shop.

Second One - Intermediate Base Section No. 1.

Last One - 1st Army, Railway Artillery Reserve.

[Usa1918]

Thx, I will pass along the info

[Tom Pearcy]

I once owned an example of the first patch and the gentleman I sold it to told me it was for Ordnance Recovery Service.