This is a delayed reply. Your fan blade is made of Ti 8-1-1. The gage code is GE however there are only two manufacturers for this fan blade since 1965. The original manufacturer was Utica Drop Forge which became Kelsey Hayes and later became Utica Corporation and currently known as TECT Corporation. The other manufacture was Sermatech Mexico for a very short period of time. Sermatech struggled with holding the geometry of the Ti 8-1-1 material.
Besides the TF34 this almost exact fan blade also goes on the CF34 (Canadair Regional Jet). There are 28 fan blades per engine. Besides the part number the only difference between the military version and the commercial version is the uncut in the platform. This uncut (thinning) of the platform allows for the fan blade to be released on the military version Incase of a fan blade failure. Without this thinning, multiple blades would fail in a domino effect.
The fan blade is precision forged from 2” diameter bar in a 8000 metric ton press (8800 US Tons). After forging it is finished machined.
The manufacturer must retain records for 30 years. The serial number are sequential. GE would need to ask one of the manufacturers for the date of manufacture. The fan blade is not a life limited component and no manufacturing date are applied to the part.