Vintage Showa Era Mahjong Set with Dedicated Case

This is from a decluttering session at my parents' house.The photos show everything included.I'm not very familiar with mahjong, but I was told that it's playable even though one tile is missing (photo ②). So, I'm listing it for sale.The case and the illustrated instruction manual have some stains (photos ⑤⑦⑧).Please take a close look at the photos and understand that this is a used item that has been stored at my parents' house for a long time.Please refrain from purchasing if you are looking for a superb, pristine item or if you are overly sensitive to imperfections.Thank you for looking. Perfect for everyday use. finest materials and excellent craftsmanship ensure long-lasting durability.