The contract Tech I own seems pretty typical for its type. Tony is spot-on in his assessment of wartime availability. I asked family members who served in WW II, and the general consensus is that you could get a razor if you had an "in" with your logistics guy (supply SGT/clerk). What I have noticed is Techs go in quite a few directions with respect to assemblies even during the war, as Gillette just grabbed a lot of random Tech parts for the non-issue, commercial models and assembled them for sale. Bakelite seems quite predominant due to wartime metal shortages. You don't even see true consistency in contract (stock-numbered) Techs, either, as other manufacturers held Army contracts for razors. However, Gillette produced the lion's share of razors. This trend continued up until around the early 1980s. My contract Tech was NOS, with a sealed pack of Blue Blades. Those blades are not fun to use. Even in my NOS 1949 SS, the blades from that set are non-fun. I keep the second NOS '49 SS set in storage, but it sure isn't for those blades.