Current Finnish military issue side mount gas masks with triangle eyepieces, screw-in filter, The Finnish gas mask is very similar in construction and appearance to the U.S. M-9A1 mask and even uses the same size canister. New Never Issued.
Mask was in good condition. Fits snugly, easy to adjust and makes a tight seal. The filter is long expired and would likely not offer protection from anything more than maybe tear gas. The mask is also designed for a filter with 60mm threads, which is larger than most mask filters you can find these days (40mm is NATO standard). However, cheap and effective 60mm to 40mm adapters are available online (Cheaper Than Dirt has them for less than $3.00 as of April 2017). With an adapter and a current 40mm filter, I think this mask would be excellent for NBC protection in a SHTF scenario.