Hi everyone! Here's a rare and scarce U-1929A porcelain Sinclair Aitken Patent insulator from the UK, manufactured for use in Argentina by the FCS (FerroCarril Sud / South Railway).

It features clear incuse markings: "Bullers LTD. London Patent" on the front and "FCS" on the back. It also includes the original and hard-to-find threaded inner skirt in the form of a porcelain pin—often missing—which is in mint condition and also marked "FCS." The main part has a little wire rub that you can see on the right side of the logo.

Dimensions: approximately 85 mm (3 1/2") in diameter and 105 mm (4") in height.

This insulator is in excellent condition. Price is $150, with shipping to the USA included. (I'm located in Argentina; shipping to remote areas may incur an additional charge.)

Payment is accepted via PayPal Goods & Services (a 5% fee may be added to cover transaction costs).

If you'd like more photos or videos, feel free to reach out. First email takes it! You can also contact me on Facebook: Pablo Daniel Sueldo—we might even have mutual friends.