The image below shows 4 different clocks at different speeds, each of them have a different time rate: at 1 unit of absolute time they read different elapsed times:

the following image shows a clock moving at .75 C that transit through (measured by) a stationary ruler :

:

he following image shows a clock moving at .5 C “measured” by a ruler moving at .4 C :

the following image shows a clock at .4 C “measured” by a ruler moving at .5 C :

The last three images show three SR equivalent cases of a clock moving at the relative speed of .75 C versus the “measuring” ruler, you can easily see that the three cases, though reading the same local elapsed times, are not at all equivalent when compared from any third part observer, or better from a observer sitting in the preferred frame:

Even though in all three cases the measurement of the moving clock read a local elapsed time of 1.33333333333, the absolute times are different as any third part observer is able to see:

1° case: ruler stationary; absolute time of the “measurement” = 1.3333333333333333; elapsed time read on the moving clock at .4 C : 1.333333333333

2° case: ruler at .4 C; absolute time of the “measurement” = 1.0183501544….; elapsed time read on the moving clock at .5 C : 1.333333333333

3° case: ruler at .5 C; absolute time of the “measurement” = 0.96225044….; elapsed time read on the moving clock at .4 C : 1.33333333333