Era of these collar devices?

[Bearmon]

Trying to figure out the era of these collar devices. I am leaning towards pre WW1 but how far back I am unsure.  Thanks for any assistance  the only marking is “bronze” on the infantry pin 

[Legion72]

The crossed muskets are the model 1875-1896 enlisted cap device.  14th Infantry Regiment.   In 1875 the Bugle was replaced by the crossed muskets as the infantry designated insignia to conform to the Cavalry ( crossed sabers) and artillery ( crossed cannons).  The pre-1875 bugles were so numerous that the quartermaster began issuing them to musicians. Probably up to WW I.  The crossed cannons appear to be bronze, I guess model 1905 to wear on the service cap.  ME is for Maine state guard.  Don't know where it was worn.  Hope this helps.  I great reference is  William Emerson's  ENCYCLOPEDIA OF US ARMY INSIGNIA AND UNIFORMS.

[Bearmon]

Thank you very much  Were the cap devices  used on Kepi’s?

[KurtA]

Bronze insignia didn’t come to be until 1902.  The infantry insignia appears to be for an officer, as there is no company letter.  EM would typically have a letter below.  There appears to be a maker hallmark on the reverse?  What does it say?  
That hunting horn is not the typical US infantry design.  Looks foreign to me.  
The 14th Inf, Arty and ME are all collar insignia - 1902 to mid/late teens.  Cap insignia was screwback.  Pinback insignia was worn on the collar.  

[Bearmon]

Kurt

The marking on the infantry is "Bronze"  Thanks for the info.

[KurtA]

That 14th Infantry is a really nice private purchase officer’s collar pin from the early 1900’s.  By far, the best of the lot. 

[Bearmon]

Thanks 

Rich