Yes, some tires don't have the UTQG rating printed out. Tires made in Indonesia for local Indonesia market often are missing this. Long time back my old Dunlop Dignos and Bridgestone Potenza also did not have them.
I hav a problem here with my Myvi spare tyre...My Myvi spare tyre, the smaller size type got 'pregnent'...And i went to a type shop to enquire....thy said thy tyre needed to be change but apparently...