The bread token started circulating at 1st of November 1992. It was equal to 10 roubles, not to 1 kg of bread. The tokens were minted in Yugoslavia, the mintage was 70 mln. pieces. At that moment Tatarstan was one of the separatist regions (together with Bashkortostan, Chechnya and Yakutiya), but unlike Chechnya it didn't want to make the central government cross. So its attempts to gain independence were double-edged. The perfect example: Tatarstan issued these tokens/coins without denomination (and before that - also checks/banknotes) which were used like a local currency, but officially they were called "social subsidies for local people to buy food for lower prices". And when the central government accused Tatarstan's government in issuing local currency, these tokens were immediately withdrawn from circulation, and then returned, and then withdrawn again.
And the petrolium tokens (bronze) were issued in 1993, I don't know which month exactly. They have never been used like a local currency (maybe the plans changed after the failure with bread tokens). At that moment there was a great shortage of petrolium in all the regions of Russia, and Tatarstan is an oil-producing region, and so its government decided to give or sell these tokens to local people so that they could buy petrolium in priority to other drivers (or maybe at special service stations - ?). But there were so many fakes of these tokens that later they were changed for copper-nickel ones.
