1970s Swiss-made Buler Astromaster mechanical wristwatch in stainless steel.

Buler Watch Company was founded in Switzerland in 1945 and became known for producing reliable, stylish timepieces at accessible prices during the mid-twentieth century. They manufactured these watches to appeal to consumers who wanted contemporary design trends without the high cost of luxury Swiss brands. Their production methods relied on durable base metals, dependable pin-lever or standard mechanical movements, and striking case designs that captured the spirit of the era.

Everyday professionals and watch enthusiasts wore these wristwatches as dependable daily timekeepers for work and casual outings. They were worn on the wrist and wound by hand each day to keep accurate time before quartz technology transformed the industry. Eventually, the shift toward battery-powered quartz watches in the 1970s and 1980s led to a decline in traditional mechanical production like this model.