Help Identifying 2 Mystery Japanese Stamps

Have these 2 Japan 30sen stamps of the Scott type A5 design. Mystery is that they both have 5 vertical Japanese characters below the chrysanthemum. The originals only have 4 characters. Also there are differences between the 2 including size of characters and shape of the denomination (30) numerals.
Does anyone that out there feel comfortable enough with the early Japanese imperial crest issues to help identify the nature of these stamps? Odds are that they are forgeries of an unlisted stamp (fantasy/bogus).
Also are there any members "well versed" and knowledgeable in identifying genuine Japan stamps from #1-54A?


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This should help - see last set of pics - https://isjp.org/thirty-sen-gray/

Thanks for the ISJP reference source re: sankos. Now I can spend time with the other stamps that need sorting to weed out some of the "forgeries".

What would be the ballpark value range for the sanko issues? Also I note monzo and mihon (specimen) issues exist. I've had 20th century Japanese mihons(specimens) ovpts and at times they are more valuable. Would the 19th century mihons carry a premium?

Definitely not an expert so take following with large grain of salt.

The intro forgery page on the IJSP site distinguishes between forgeries marked as "mihon" and actual specimens, so anything you find for older Japan is likely to be a forgery. I've sold a few "sanko" forgeries recently for 10-15% of what a genuine would go for so there's a market for them.

As you say, 20th c. mihon actual specimens are generally more valuable than regular, but don't seem to carry a huge premium.

Historically, mihons of the Dragons and Cherry Blossoms sold for somewhat less than a mint stamp. There are also "Sumiten", specimens for the issues marked with an ink dot from a pointed brush. I've seen recent auction offerings at huge estimates that didn't come close to being sold.

(found online)

I can do a couple of identifications for you; add to this thread. Realize that proper determination of genuineness involves plating the stamp. Any beyond that and I recommend you buy the ISJP monographs for the issues, available through their website.

hello
could it be :
Michel JP 15x
Stamp Number JP 18
Yvert et Tellier JP 14
Stanley Gibbons JP 39
Sakura JP 14

stamps from 1875, quite old
cheers

Again: no!

This is the third old and solved question where, today, you offer a suggestion that is incorrect. You might want to read the posts in a thread before doing so. As you can read in the original post




Your suggestion is a stamp that has four characters and not five. Hence, from the original post, it was clear it was not that stamp.

I suggest you join the ISJP (isjp.org). They have a digital identification service where you can submit a digital image of your stamp and they will tell you if it is a forgery. If you want a certificate of genuiness, they will certify your stamp for a cost. Their certificates are accepted by every auction house I have worked with.

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Interesting- I didn't know about that site. I may use to see about some of my early MX Hidalgo stamps from 1868-1872.