1950's Reticulated Gorham Sterling Oblong Shell Bowl

Lovely reticulated sterling silver Gorham oblong dish with shell design on handles. Measures approximately 8 1/4" long by 5" across by 2" high at handled end. Underside marked Gorham Sterling 1998 with a 1 in a shield and the usual lion, anchor and G markings. Piece is in good condition. Some wear to bottom of inside and underside has two long lines which almost look like tarnish but are not- on either side of markings- not sure what these are. Please see all photos for accuracy. Piece could use a good clean. Approximately 123 grams. Non-smoking home. Thank you for looking!