Hello,
I am in the Product Development for 25 years with 18 years expertise in Electronic and Analogue watches design, development and manufacturing; with team to support the Mechanical, Hardware, Firmware and manufacturing in China.
I and my team not only could design the watch but also guide you on the limits for manufacturing, availability of quartz analogue movement to use and could support you well on the manufacturing, such as assembly, reliability testing and share our experience on options for the materials you may consider to lower down the overall product cost.