All Products › British GSR Filters (Open NOS) Image 1 of 1 British GSR Filters (Open NOS) from CA$5.50 sold out These filters are intended for use with the “GSR” mask. The filter packs are originally marked for a 15 year shelf life. Year of Production: Select Year of Production Training Filter 2008 2010 2011 2012 2013 Get notified by email when this product is in stock. Sold Out Added! These filters are intended for use with the “GSR” mask. The filter packs are originally marked for a 15 year shelf life. Reviews Reviewer Name Review Date Star Rating Description Posted on Etsy Product Show More You Might Also Like USGI M11 60MM Filter NOS CA$16.50 Sold out Polish MC1 Kit CA$27.50 Sold out USGI Vehicle Crewman M42A2 Gasmask w/ Accessories CA$315.00 Sold out Yugoslavian M1 Gasmask from CA$49.50 Sold out East German GP-5 w/ Hose and "Coffee Can" Filter (Size 4) CA$49.50 Sold out