@davidships
Your Greek info is (mostly) right.
My Greek part comes from the official greek registries so i am sure this is correct. The Greek P (means R) can be easily mistaken for D but the correct is ARGONAUTIS R.
Sometimes the owner is different in the official papers stating the person legally responsible for the tug, so there might be differences.

Dates and other info fits with mine i think...

20.38 x 5.36 x 2.20 (dr 1.68)m
built 1929 by Scheepswerf W. Mulder, Stadskanaal

1929 J Ruissen, Wemeldinge as HOOP OP ZEGEN
1954 Sleepdienst De Roode Ster (Joseph Roelofs), Rotterdam as BERLAGE
1968 Gerrit J Eerland Lcm Zn, Rotterdam as MARIE 10
1969 Sleepdienst & Transportonderneming Gerrit J Eerland, Rotterdam as EERLAND 10
1979 Spanogiannakis, Athens as ARGONAUTIS D.
19xx Capt Costas, Samos as RAFINA
by2014 Pythagoras Shipping Co, Samos

Maybe Greek bit isn't right - or perhasps it can all fit with Nektarios's info somehow?
Been re-engined a few times.

Built 1929, 47 gt.
ex. ARGONAFTIS R. from 2-7-79 to 23-5-1985 (Registered at Piraeus, off. no 2584, Owner : Kordonis Nikitas)
ex. RAFINA from 23-5-1985 to 7-9-2001 (Registered at Piraeus, off. no 2584, Owner : Kordonis Nikitas)
RAFINA, registered at Samos (off.no 333) from 7-9-2001 until today. Owner : Houlis Nik.