Hey guys, I just came across a 6904 recently and am having trouble finding its manufacture date. Iv read that you must purchase the standard catalog of S&W in order to retrieve this data. I was hoping someone on here could help me out, this is the first S&W I have owned (liked it so much I went out and bought a Shield shortly after and love that as my new EDC). SN is TZF 9xxx (got my answer thanks)