This is the [Musya Hyakushiki Kai] from the SD Sengokuden: Fuurin Kazan Hen SD Gundam BB Senshi Shinsei Musha Goninshu, which was serialized in Kodansha's Monthly Comic Bonbon. It's a snap-fit model that doesn't require glue, making assembly and disassembly easy♬ Box dimensions: 20.5cm x 15.0cm x 5.0cm A sticker from the toy store where it was purchased is still affixed to the lower right corner of the box. This item was purchased over thirty years ago, so it's uncertain whether all the original small parts are present, but the uploaded photos show everything. Bandai SD Gundam Gunpla