These are US-made sterling crosshatch grid FPs with silver-colored (either silver- or chrome-plated) tassies and clip instead of the standard goldplated trim. Notice there are two different styles of inscription where the Parker name is seen under the clip and diametrically opposite on the back of the cap. These two styles imply that Parker produced these during two different periods.
Here is a close-up of the cap tassie.
