[TR] TR3 Part number help

[Randall]

I have a very poor copy of what is apparently a fairly rare amendment to the factory  TR2/3 Spare Parts Catalogue.  It is identified
as "Supplementary Amendment to be issued with Amendment No. 3" and is dated June 1964.  The heading on each of the two pages says
"Supplementary Amendment No. 5".

Eventually, I'll include this amendment (suitably cleaned up to be legible) in the PDF file I keep on Google Docs.

However, one item has me stumped.  This is for "Buffer, Bonnet, Rubber" on page 87.  As best I can tell, the part number is either
513576 or 613576, but I can not find either of those numbers listed anywhere else.

The next number, "Retainer, Bonnet, Buffer", P/N 613575 seems to be equally elusive (although the number seems pretty clear in the
scan).

If anyone could shed any light on this matter, I would appreciate it.

Here is a close-up of the two numbers, doctored for about the best resolution I can get
http://s258.photobucket.com/user/TR3driver/media/Part%20number%20question/Part%20number.jpg.html
Note that the shadows above the upper number are print-through from the other side, so not a clue to what the first digit is.

For context, here is the entire line item
http://i258.photobucket.com/albums/hh260/TR3driver/Part%20number%20question/Amend%205%20Pg%201%20Bonnet%20buffer.jpg~original

And the whole page
http://s258.photobucket.com/user/TR3driver/media/Part%20number%20question/Amend%205%20Pg%201%20contrast.jpg.html
(click on the magnifying glass to zoom in)

My main interest is in figuring out the correct part number, but I'm also curious as to what the difference is between this and the
CD24541/CD24540 buffer listed on page 86 and shown as item 9 on plate AJ.

-- Randall