Nikon Camera Parts 2 Nikon N4004 F401 Mirror Box Unit PreviousNikon FT FT2 FT3 FTN Battery Cap NextNikon FM3A Chrome Shutter Speed Selection Wheel Nikon N4004 F401 Mirror Box Unit Nikon N4004 F401 Mirror Box Unit $59.99 New Old StockPart# 1B990-256 Quantity: Add To Cart Facebook0 Twitter Tumblr You Might Also Like sold out Nikonos III and IV-A Syncro Terminal Cover $30.00 Nikonos V Sync Terminal $23.00 Nikon EM FA FG FG20 FM FM2 FE FE2 F3 Battery Cap $35.00 Nikonos II Camera Top No Finder Glass $50.00 Nikon DP-1 Meter ASA Scale $5.00