Regitze Overgaard is a renowned Danish designer, who also works for Georg Jensen. She has contributed designs also to Anton Mikkelsen workshop in the 1970s. Her works from the own workshop are signed ARENT or R in oval.

Not pre-owned, from the artist's workshop
Design 1960/1970s, signed ARENT (her husband's name), 925S + R in oval 
Size: US 5.75 - 6 / EUR 51, 1.7 cm high the front