Tramadol 50 mg of Thai origin, as far as I can tell.

Google didn't reveal much to me - any experience/confirmation that this product contains what it claims to?

I've never seen Tramadol in a Capsule to my knowledge they do not make it. I work at a hospital and have dispensed Tramadol to many patients and most of the time it comes as a small white oval pill with 93 58 written on it. So I don't think that what you have is really Tramadol.

Many companies manufacture it in capsules in foreign countries including in ER formulations.