finishing not more than the 3rd position occupied in the periods 1945-46 and 1947-48. In the period 1952-53 he finished last in the 6th place of the 1st Division of the EPI Piraeus Championship, which led her to claim her stay, through a barrage fight with the champion of the A2 'class and coopitos, Aris Piraeus. In the first match, they scored 1-1 in the Nikea Stadium, before some 5,000 spectators and in the second and repetitive games they were re-scored, but no goals were scored this time (0-0). Thus, in the third game, Proodeftiki was defeated by 2-1 [24] and temporarily deferred to the A2 'category. In the A2 'category he played temporarily for two seasons (1953-54 and 1954-55) when the latter finished at the top, in front of the Piraeus Glory and won the championship. So, as a champion, she had to claim her return to the first class, through a grading match, with the latter, Panelefsiniakos. In the first match, it won 5-3 away in Elefsina and in the second one they scored with 1-1 home in the Nikaia Stadium and secured her return to the top of the Piraeus championship. 1955-1959: Great course and distinction and rise in the newly established Alpha Ethniki Then, in the second half of the 1950s, the club began its most important career and was established as the third force of Piraeus. Initially, between 1955-56 he finished third, behind Ethnikos Piraeus and Olympiacos and in front of Atromitos Piraeus. In the following two seasons, 1956-57 and 1957-58, he finished second and highest ever in the Piraeus Championship, behind Olympiacos and in front of the National League, winning as a secondary her participation in the respective championships (1956-57 and 1957-58) of the Panhellenic Championship. In the 1956-57 Greek Championship, Proodeftiki finished in the 9th and penultimate positions, ahead of the Panagiersakos beat and behind Panionios and remarkable victories was the prevailing on Panargiakos with 5-1 in and 0-4 away, while Petros Christofides, one of the team's top players, scored 15 goals and was the top scorer of the championship. In the 1957-58 Greek Championship, it made its best, finishing in 6th place in a total of 12 teams, while the victories over Panathinaikos (1-2 with 1-0 in home) and home wins against PAOK (3-1) and OFI (4-0) respectively, and also the away wins against Panionios and Apollon Kalamarias with 1-2 respectively. In