"Letter Box"(P-1-?) Karakuri Box Akio Kamei

"Letter Box"(P-1-?) Karakuri Box Akio Kamei

Unfortunately, I cannot distinguish between "Letter box A", "B" and "C".(It is obvious that this is not "Letter Box D" or "D-3".)

 I have a picture of the solution sheet, if you know anything about it please let me know.

Excellect condition. With original box and solution sheet.   Discontinued.

Size:250x86x70 mm.

You can see details here;
https://www.karakuri.gr.jp/creation/kamei/kamei.htm

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Ship from Tokyo, Japan. (So my English is very poor, sorry)
*Payment can be only Paypal or Wise. If you choose Paypal, it costs extra money to handling fee of Paypal(4.5%)
(*Please refrain from paying immediately as we will inform you of the total amount after purchase.)

The shipping cost $30 (Actual shipping costs will be determined after the end of the auction.) 
*I can ship together other items.  You can save the shipping cost. 
*It has tracking number.