King Leopold1- Beligium- Imperforated- Genuine?

Hello,
Recently, I retrieved these two stamps from a mix lot displayed in a stock book. The seller did not mark with any numbers in them to assist the buyers. The Seller seemed he did not care to research this stock book, since it was not his desire or specialty to learn about them. I am not sure if they are from 1861 or 1858 year of printing. I just started to familiarize myself with Belgium stamps.
Since many countries had notorious forgeries done with early European stamps, I was wondering if these two stamps show on both the proper design as required as a comparison to genuine stamps? I do not know if the 24 postal number on the red 40 cent would be able to verify it was a legitimate area in Belgium.
The first King Leopold 1 is brown, 10 cents, and the other is light reddish color, 40 cents in translation. Both are in used condition, imperforated with no gum. The 10 cents has thick paper, while the 40 cents is thin.
I attempted to check for watermark designs, however, neither display them in the back of each stamp. I used Ronsonol fluid to checked and placed near the light. The 10 cents appears to have had a light hinged impression existed in back of the stamp.

I uploaded images of both front and back. Any information would truly be appreciated. Thank you.

Hi

According to my Scott's Catalogue, the 10 Centimes imperforated brown has the following printings:
1849 watermarked 2 "L"s in a frame, the same on thin paper (1849-50), then 2 "L"s unframed (1851-4) and finally no watermark (1858-61)

The 40 centimes is known in the following printings: on thin paper (1849-50) , watermarked 2 "L"s w/o a frame (1851-54), and, also un-watermarked (1858-61).
Hope this helps?

Chimo

Bujutsu

No Wmk. then they are Sc: 10 & 12. The 10c is maybe a Hitler stamp!

The stamp was produced in the 1800's..What do you mean Hitler stamp? do you mean due to the 24 local? I have no idea about that.

Here's my two cents. take it for what it is worth.

One of the major determinations is if the stamps are watermarked or unwatermarked. If you found no watermark (the watermarks are usually fairly obvious) with Ronsonol, then we will assume the stamps are unwatermarked.

The stamps that are unwatermarked still come in two types however.

For the 1861 issue, the stamps (design) are 22mm high, oval 17.25mm high.
(Scott 10 10c brown CV $9; Scott 12 40c vermilion CV $80).

For the 1858 issue, the stamps(design) are 21mm high, oval 16.5mm high.
(Scott 10b 10c brown CV $10+; Scott 12b 40c vermilion CV $110).

You will need to measure your stamps.

Don't get your hopes up on the 40c vermilion too much. It appears cut into, and is worth considerably less than the CV.

Finally, the barred horizontal cancellations on your stamps appear to be "4" = Anvers on the 10c brown, and "24" = Brussels on the 40c vermilion: both common.

I find early Belgium to be fascinating, and as a WW classical era collector, I have spent some time on these issues. FWIW, I will be publishing a blog post for these issues in the months ahead.

Is the 10 cents considered to be scarce or valuable?

I think Perf 12 is joking, because the 10c brown has a "Hitler" mustache appearance.

Thank you everyone for your kind responses. I appreciate your comments. I just begun to oollect Belgium issues. I look forward to reading your blog post in the future, Jkjblue.
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I gave the catalogue values (CV) for the stamps above.