The headcar 2103 is officially old rebuilt ER12-6001-05, but factually 6001-05 was scrapped at RVR factory and a head-car from consist ER2T-7134? that had been sent to repairs but due to crisis in Russia, Russian railways wasn't able to pay for the repairs and therefore it was turned into ER2 headcar and was sent to Estonia under the number 6001-05.