What Does A Cross Mean In Stanley Gibbons Catalogues?

I just came across a cross like this: † in the value columns of the Stanley Gibbons catalogues and I don't know what it means. Can anybody help?

According to one of my SG specialized catalogs a cross in parenthesizes (†) means "does not exist".

"does not exist in that condition" such as mint or used .Better said as none found yet.

As an example of the usage...
SG use (mainly) two columns for prices... unused and used.

Stanley Gibbons price many stamps "used on cover" so obviously that symbol is placed in the first column as an indication that it does not exist in unused condition.

A practical example:

Gibbons list this imperf pair of the Bhopal ½ Anna green of 1944-7 imperf



as '†' mint but priced used.

That suggests that Gibbons believe no mint copies of the stamp imperf survived - that all the imperf copies were used, like this. As there was probably only the single imperf sheet in the first place, and the entire sheet was probably used on correspondence, Gibbons are probably right to rate it '†' mint. I'd be very suspicious of a mint pair, anyway.

could be too that they exist but in very few numbers and none sold at auction to give a fair catalog value?

"could be too that they exist but in very few numbers and none sold at auction to give a fair catalog value?"

In that case S.G. use a blank space or a - in the appropriate column. S.G. state that the "dagger" is meant to indicate that something cannot or does not exist.

It's a shame SG doesn't explain that stuff in the preface

Maybe it depends on the Gibbons catalog used. This is what is in one of mine.