this category mainly focus on early wristwatches in enamel dial, they appear in many case construction, such as half hunter, full hunter, borgel, hermtic, semi hermetic, full hermetic, 8 days, direct read, chronograph, calendar, officer trench, left hand, 3 pieces oyster case etc.
examples in the picture is a 9k beautiful enamel cushion by rolex, NFS.
early 9k rolex dunkling screw back
model 4499, very attractive enamel dial, double sign 'Dunkling", Australia retailer, a minor line between 10.30 to 11, big case 35mm, screw back, early waterproof design, very rare 18 jewels sign on bridge not wheel, solid 9k case, working condition, may required oiling.