marking looks like (05-13-03) unique balance 286(?) not sure of the last last digit...also the first numbers look like date code...metal to metal 29 in...i couldn't find it in you catalogue
Tom from SWISCO responded:
November 28, 2017
I believe our Series 380 channel balance can replace yours. This comes with the 19-005 top and 15-005 bottom. As long as the dimensions of these parts match up then you should be okay.