This is an excellent example of the famous Watermans Ideal. This is the No.12 Eyedropper, an early version of the later lever fillers. The ink is injected directly into the barrel using an eyedropper (supplied). The pen was made in the USA around 1918 and is in very good condition with a good imprint.
The pen has been fully restored and now works perfectly. It is fitted with an amazing Medium Full Flex nib.