I purchased a variety of fittings to completely outfit my workshop with milton P style fittings. Only these, the 1809 model 1/4 Male couplers came in with no gold coating like all the other Milton fittings I ordered, and they do not say Milton anywhere on them. They do not match pictures online of other Milton 1809 couplers, which are coated and stamped with the manufacturers name. These also have very rough machine tool marks. These specific fittings were either outsourced or cheap counterfeit fittings.
Note:
The rest of the Milton fittings/couplers I purchased are superb in quality and match exactly what I have used at work with great success.