Japan Booklet Pane Issue Circa 1980 - Unable To ID In Scott Nor In Sakura

The design is based on SC 1416 and I do not have an image of the booklet cover.
The serial number is interesting and I am wondering if perhaps these were dispensed in a machine.
It was unusual and my curiosity led me to purchase as it appears to be genuine.

Has anyone here seen these before?
Cheers

Try 1980 issue . Scott 1416 and 1437

Isn't the Scott #1437 a coil stamp, imperf on the left and right hand sides?

Yes this is the perplexing thing. It is not imperforate at all so it is not like a normal booklet issue. There is no record of a booklet issue for these in any case. Further, most perorated stamps were issued in sheets of 20 with wider margin tabs than shown in this case. Exceptions to this rule are usually noted. It is also curious that Sakura doe not have an image of this booklet - their catalogue imaging is far more comprehensive than Scott.

Observations.
Sakura 462 (480 coil)
Animal, Plant & National Treasure series
1966-1989
Booklet Panes BP32 to BP44

Booklet Pane BP43 appears to be missing
Booklet Panes do not appear to be numbered.

Possibly a partial sheet ?

Yes, a partial sheet was my thinking except for two things.
Most significant is the presence of a serial number. These may have been specially purposed for something - maybe Government office issue or something related to an inventory? Who knows.
Also most sheets of 20 are 4 across and five down. This is 5 across - maybe from a sheet of 50?

A lot of countries serialise their stamp sheets, as a form of print accounting.
(A record of gross production is still "accounting" in my book)
Australia for instance.

The serial numbers in Japan are typically found only on their New Year Issues.
This type font is not seen in general issues.

The sample Japan Issue I uploaded did not seem to work - here it is again

I wondered where you were going with that
Gumtree, there is a direct difference there, being the print on the stamp, and that on the selvedge.

It appears very important to you, time to seek advice from Japan bloggers or a Japanese society.
I've exhausted my observations.
Please let us know what you find.

The larger stamps shown above with red numerals are New Year lottery stamps. Each stamp has a unique number. Japan has issued this type of stamp since 1989.

As New Zealand also, just once from memory. "Scratch and win" ?

"The NZ stamps each have an attached tab with a scratch and
win type label in a competition to win prizes of cinema tickets, free
stamps and a trip to Hollywood"

http://stampsnz.com/1996_centenary_..._cinema.html

I decided to get this if only to satisfy my curiosity.
The inscriptions translate roughly as
1988 Anata no machi no yubin kyoku – [Your local / town post office]
Fujisan me-ru pen [Mt Fuji Mail Writing]
Yubin Kitte [Post Office Stamps] Choba [accounting office] shu [collection]
The photo inscription is #30000; #36011; #28246; Lake Tanuki [an artificial lake] & Fujisan [Mt Fuji] Sakura [cherry blossom]
So this appears to be an internal / in house collection for the Japanese Post Office Stamps Accounting Office. The cover is good commercial Printing quality, similar to other Japan Booklet Panes.