1570 hairspring question

[jban5]

My 1680 dropped and stopped it from running, a day ruiner for sure.

I took it to my local repair, an excellent technician who is just getting his start here and had him look at it to see if it was indeed a staff, it was, and he pointed something out to me. The hairspring is gold, not blued or steel.

Is this an after market hairspring or did Rolex use gold (colored) ones?

Thanks