Collection of Da Vinci-Ball Timer DIY Assembly Model

https://5993.cyberbiz.tw/s/files/5993/ckeditor/pictures/content_b3c5152b-8ea4-4d5f-a224-c06911b0b2b0.jpg https://youtu.be/OV5XLZXteVQ ▲Reproduce Leonardo da Vinci's genius design, a model that novices can easily complete! https://5993.cyberbiz.tw/s/files/5993/ckeditor/pictures/content_f1f80711-29eb-4f15-ac86-e42469863b86.jpg ▲The ball timer uses precision gears to make the rolling ball drive the platform in the seesaw mode. Use the principles of gravity and dynamics to measure the passage of time! https://www.youtube.com/watch?v=1GDNV-eYaKU&feature=youtu.be ▲Congreve Rolling Ball Timepiece ▲The assembly process does not require glue, paint or batteries at all. It only requires careful eyes to ensure that various gears and parts are installed correctly. The position enables the gear to drive the chronograph. https://5993.cyberbiz.tw/s/files/5993/ckeditor/pictures/content_808ec3e1-19eb-41c4-84ff-9b48364eece1.jpg https://5993.cyberbiz.tw/s/files/5993/ckeditor/pictures/content_1c00384f-909e-4c49-b931-af94457846ae.jpg https://5993.cyberbiz.tw/s/files/5993/ckeditor/pictures/content_d3ea99a4-c70d-40c4-8b60-9cc0f1e5afcf.jpg https://5993.cyberbiz.tw/s/files/5993/ckeditor/pictures/content_77936626-ec6a-4aa7-81c0-5ea7bc71195e.jpg Specifications: ► Product size: 10.6 x 7.9 x 2.4 inches ► Packing size: 20 x 30 x 5.75 cm ► Material: Plastic ► Origin: Philippines Precautions: ► No battery, no coloring, no glue can be assembled ► Be careful of children swallowing small parts ► This product is suitable for use over 14 years old ► Please note that the appreciation period is not equal to the trial, if there is assembly, it will affect your return rights. Please keep the packaging intact when returning or replacing the product. If it is damaged, it will be difficult to return or replace the product. ► Books, merchandise, gifts, etc. covered with plastic film will not be returned if the plastic film has been opened. ※ When assembling, be sure to confirm that each part is assembled and tightly assembled to ensure the correct operation of the model after the assembly is completed.