The 3R:30152942..30209020 release 6 coordinates of the left breakpoint are estimates. The left extent corresponds to the estimated position of right end of polytene band 99D9, which the reported cytologies indicate is not deleted. The right extent corresponds to the right end of RpS7, which published results say is deleted.
The 3R:32081331 release 6 coordinate for the right end of Df(3R)R133 corresponds to the right end of the 3R genome assembly because the tip of 3R has been replaced by bands from the Y chromosome.
The Df(3R)R133 chromosome does not act as a dominant suppressor of telomeric silencing (assayed using the effect of the chromosome on the eye colour phenotype of flies carrying "P{wvar}KR3-2", a stable "brown-red" variant of the P{3'WP-2,wvar}2Lt insertion).
Heterozygotes with Dp(3;1)124P are lethal and heterozygotes with Dp(3;1)67A are viable.