What Cavalry unit is this, and what does the "A" represent?

Jhon Caprisi — Sun, 08 Oct 2017 16:45:55 -0400

My dad use to collect antiques long story. But we been cleaning out the house and found this

Response by SPC Private RallyPoint Member made Oct 8 at 2017 6:15 PM

SPC Private RallyPoint Member — Sun, 08 Oct 2017 18:15:19 -0400

My best guess is 7th Cav, A Co. Though I think Cavalry like Artillery uses something different for Company level elements. I think it's Troop, like Arty uses Battery.

EDIT
A quick check says the 7th Cavalry Regiment, A Company was formed at Fort Riley, Kansas in September1866 and that the Company was changed to Troop in 1883.

Response by LTC John Griscom made Jan 18 at 2018 12:49 PM

LTC John Griscom — Thu, 18 Jan 2018 12:49:02 -0500

This is A Troop (Company) of the 7th Cavalry Regiment,