Nivarox Mainspring for ETA caliber 2890, 2892, 2892-2 Automatic - Alloy

Nivarox FAR Mainspring for ETA caliber 2890, 2892, 2892-2 automatic movements and likely others as well, alloy, new in sealed package. See images for further details.  These mainsprings are new and are being sold at cost. Images do a very good job of representing the item.