Argentinian Airmail Envelope fragment with Commemorative Stamps

This is a postal history fragment from an Argentinian airmail envelope addressed to 'ALEMANIA FEDERAL' (Federal Republic of Germany). The fragment features blue and white diagonal 'airmail' border patterns along the edges. It bears three distinct horizontal commemorative postage stamps from Argentina, issued circa late 1970s. The top stamp depicts a scenic landscape (Quebrada de Humahuaca), the middle stamp shows individuals engaging in winter sports (Skiing), and the bottom stamp features a portrait possibly of a historical figure such as Admiral Brown, each with a face value of 30 Pesos. The envelope displays multiple black circular date stamps (CDs) from 'POSADAS ARGENTINA' and wavy line cancellations across the postage. The address is typed in black ink, directed to Reinfried Keilich in Helfenbrunn. The paper shows slight yellowing consistent with age, and the fragment is irregularly cut, signifying it was removed from a larger piece of mail. The stamps are well-centered with intact perforations, and the cancellations are clear and legible, providing good evidence of authentic postal usage during the mid-to-late 20th century.