This Jubilee bracelet is suitable only for the following new 6R15 movement MM models: SPB185/SPB187/SPB207/SPB240/SPB255/SPB299. Please note that neither the case nor the watch can be assembled. It is only suitable for the original Seiko of this watch, if unclear whether you can install it, please contact the owner for confirmation. Returns require original packaging. If the returned strap has scratches, dirt, or other issues due to lack of protection, returns will not be accepted. Please look carefully before placing an order. Do not place an order if you mind. The total length of the strap is 190 mm and the width is 20*18 mm. The thickness of the strap is 3.5 mm, with a 2.5 mm spring bar. The head and buckle are solid. If you don't know how to assemble the steel strap, please purchase with caution. The cell phone watch strap is real, the watch and case are shown in the figure, only the watch strap is sold. Please do not buy if you have high requirements. Thank you.