There is a part number on the DVD, so that may be a way to find out if the 'install DVD' is or
is not a drop-in installer or upgrade for earlier OS X. From what is visible in the image, it does
not appear to be an update for Panther 10.3 version. And a grey-label would indicate the disc
was intended for use with a specific build version Mac only. So far, it poses as a full install DVD.
The G3 iBook (white and colors) did not ship with a slot-loading optical drive. Is yours a G4?
From what I can tell by looking that the Install DVD Tiger image you posted, it most of the
numbers match a retail Tiger full install DVD, that I have one still in the official retail box.
Mine says:
Mac OS X Tiger includes XCode 2
Version 10.4 2Z691-5305-A
If you have access to the actual DVD, try a search of the item by the part number; it is obscured
in the image you posted, so I can't tell from what I see enough to search. And the numbers I do
see are not among those shown in MacTracker database which shows all OS X build versions.
{One thing about a Tiger install DVD, is the content of the disc is compatible to the capacity of a
single-layer media; so if needed to, one could make an emergency backup disc with older style
optical drive. Later OS X versions have more content and a dual-layer drive would be needed.}
Should the cost for the DVD be actually cheap and a full retail disc, that may be great deal.
Sites such as welovemacs and others who used to deal with out-of-stock older system install
media, you sometimes can see what they're asking should they have a few for sale again.
This page has images of the labels of original media retail older OS X install discs:
http://www.macworld.com/article/2101301/advice-from-an-apple-tech-how-to-get-old -mac-os-x-install-discs.html
{While I have some original OS X retail media discs on DVD, the oldest I have is Jaguar or Puma;
I have Tiger in the retail box & the image you show looks like an install-in-any supported Mac DVD.}
Are you sure your iBook is a white G3, or is it a G4? You state it is a slot-loading optical drive;
the G3 models all had tray-loading optical drives. I used to own a first model dualUSB white G3
and no iBook G3 models use a 'slot-loading' optical drive. Not until the first G4 iBook... And I
have a last model G4 iBook in near mint condition, still. It shipped with grey-label Tiger 10.4.
Good luck & happy computing! 🙂