Essex Terminal

What is going on here? Both of these vans are numbered 54! Two photos Windsor 9/8/1981 Tim Vermande
This was a replacement of two old home built vans (54 and 55) with newer used cabooses. See below.

ETR 54 ex PC 23045 nee PRR 6/04/1980 Jack Smith

Modern cabooses 1610 and 1600 acq. 1990 ex CP 434530 Angus 1975, 434638 Angus 1979
Windsor 4/01/1992 Jack Smith