This variation is for both NTSC and PAL as there is no difference between the two on the ColecoVision Video Game Console.
First CollectorVision release of Mario Bros, available on cartridge.
*Important Scoring Note* For score rollovers, the last zero is a null value after you reach 1.2 million. So score rolls at 1.0, 1.1, and 1.2 million. After that, it appears that the next rollover is 2.2 million, but in fact it's 1.3 million because your 6 digits of score have been shifted left and the 7th digit isn't supposed to be there. This phenomenon happens again after 1.4 million. The score appears to have 7 digits when it really only has 6.