During the 1960s, Fermo made a series of historically important models for SAS, and among these we find this beautifully executed de Havilland DH-9 in the livery of DDL, Det Danske Luftfartsselskab or DAL, Danish Air Lines. DDL flew the DH-9 from 1920 under the register of T-DOGH, so the register T-DDDL was probably made up for this model. The models in this series were one-offs, and if this model still exists today it is probably owned by SAS. However, during a visit to the Danish SAS Museum in 2017, some models from this series were on display, but this one was not to be seen.