Identifying engine mount production date?

[sileighty]

I read that you can read the production date for your engine mounts by looking at what's molded into the mount. I took out the engine mounts from my eta that I'm parting out to put into my iS (my mounts broke rallycrossing last weekend and I need to fix my car to autocross next weekend, so I'm putting the eta mounts in until new ones arrive online).

There's 2 sets of numbers on my mount. One set is 11, 12 and the other is 13, 10, 3. What do these numbers mean?

[superj]

maybe month and day, or month and year? it could be the batch number, too, in case there is some kind of quality issue and they have to recall them

[D.Martijn]

I'm pretty sure it's the month and year.