Ceylon. Missing Sg Numbers From 72 To 120

Hi all.
I hope somebody can help. I am looking over a collection as part of a deceased estate and came across some QV Ceylon stamps with a penciled in number of 106 and 101. they have a value in shillings so pre 1970.
However looking at my SG C/Wealth cat there is a whole series of numbers missing. No explanation. Does anybody have a helpful memory of Why?

As always "here's hoping" and many thanks in advance for reading this.

Peter in Jersey

It would be helpful if you could provide pictures.

Stamps may be delisted because they have been found to be fakes, or have never been issued and have found their way onto the market by illegal means.

An other reason might be the listed colours were changelings. Considering the range, it is unlikely. However, it might be due to a paper variety that, later has been found to be caused by minor variations that do not warrant separate listing.

A final reason might be that colour variations (shades have been reorganised and now have an added letter, rather than an own number.

The numbers did no longer exist in 2007.

Hi PAPAJ, looking at my 2016 SG Commonwealth, between the 1867-70 set (ends SG72) and the 1872-80 set (starts SG121) there is just a short line stating 'Nos 73 to 120 are vacant'. No explanation. Must admit I have never noticed this before!
Regards
DavidR

I assume you mean 1870. They are not Scott catalog numbers either because Scott numbers in that range are the 1885 overprints (in cents).

I found a 1912 SG catalog online and SG 101 and SG 106 do exist, but they are also post 1870 (cents). Plus, the other numbers don't line up with DavidR's 2016 numbers -- in the 1912 edition, the 1863-7 set runs SG 54-77 and 1872-80 set starts at SG 81. Clearly the listings have changed numbering over the years. Any clue about how old is the album where those pencilled numbers were found?

Comparing the listings, the old nrs. 81 and following have been renumbered from 121 in the same order. So, 106 became 148. 101a/b are 139/140. Maybe, numbers have been reserved for possible Crown CA watermark paper used with the old currency but have never been found.