They come in real handy for checking Nos parts being sold on Ebay.... often they are wrongly described and sometimes it can be advantagous.

I got a set of Nos outer sills a while ago for $118 that were listed as Statesman.... when I checked the part numbers I found they fit panelvan and ute.... bargain..(my HX catalogue paid for itself with one purchase) ..... I have also found a lot of WB parts listed as being for earlier models... while they ma fit and do the job they are often different to the originals from an earlier model.

I don't care what condition they are in as long as all the pages are there and ledgible..... they are a wise investment for parts hunting.

Some of my parts catalogues: