Railhead and Regulating Stations grouping.
An interesting i.d.ed group with an embroidered A/S Advance Sector patch, two Is-Sur-Tille Railway Regulating Station patches; one has an embroidered red R and a bullion border, the other has an applied red R and yellow border.  Very nice variations!  Also includes two scarce armbands, I believe T D is Train Detachment and T.S. is Train Station.  Please feel free to correct me if I'm mistaken!  Lastly a dog tag style i.d. disc, not pierced that identifies these pieces to Frank L Tullis Co. C 58th Eng. $350.00