In this pic you will see three diffent U numbers, 3 different colors and 3 different railway lines. All of them were made in the UK but used in Argentina. in order: U-1540 white top incuse bullers logo and FCS (Ferrocarril Sud, South Railway in english) ink on top of the logo. U-1452 brown LGSM (Linea General San Martin) incuse in crown and the bullers logo on top. U-1458 (rare model only found in Argentina) with BAP (Buenos Aires to Pacific Railway) incuse and no marker. I can tell because I have same model with ink maker Bullers. You can check on the nia.org page in Argentina Porcelain Section.

Cost: 180 usd. Shipping included to the US (cost about 55 usd).I accept PayPal but only as good and services so i might ask for that 5% extra charge.