Checking belt markings for date of manufacture

[LS1toNSX]

I took my recently purchased NSX and had my 60k service done (first time on a 93, it was way overdue!), and I examined the old belts. The a/c and alt. belt looked like they had some cracks when bent, but the timing belt still looked new. Are there any markings that indicate the date of manufacture on any of the belts?