72hr power reserve = authentic?

[cool-canuck]

I'm in the market for a Daytona and considering ways to potentially authenticate the watch if using an AD was somehow not possible. I was thinking the 4130 movement with the 72 hour power reserve would be hard to replicate given that most watches are in the 40 hour range.

Has anyone heard of a replica with a 72 hour power reserve? Is the 72 hour power reserve perhaps too complicated for a replica? Interestingly i found Seiko makes a spring drive movement with a 72 hour power reserve but the prices of these watches approach Rolex prices.