INGMAR is of Type 20 by J. J. Sietas, Hamburg-Neuenfelde of which 8 ships were built, UWE was a different design Type 8 of which 3 were built (same GT but 4 meters longer and different layout) Many different types and close designs followed. If you need any specific details I might be able to help.
Best wishes, Manfred
Many thanks Manfred. Your offer is much appreciated. It's just that my Dad sailed as Mate in "Ganton" (Uwe), and he liberated a set of plans from some forgotten locker when he left her. I still have them, but they are faint due to fading with age.
The three type 8 ships: KERSTIN, Yardnumber 439 for Friedrich Dauber; FRIEDEL, yardnumber 472 for Richard Garbers and UWE; yardnumber 478, IMO 5375060 for Friedrich Dauber.
The eight type 20 ships: CARINA, yardnumber 475 for Hans Peter Wegener; NORDCAP, yardnumber 496 for Amandus Gahde; MARIANNE WEBER, yardnumber 504 for Dorothea Weber; HANNES KNÜPPEL, yardnumer 506 for Hans Hermann Knüppel; RICHARD RAHMANN, yardnumber 513 for Richard Rahmann; PAUL MEIER, yardnumber 511 for Gebrüder Meier; HINRICH BEHRMANN, yardnumber 515 for Albert Behrmann; PAULA, yardnumber 523 for Henry Breuer.
Missing IMO Data appreciated