With recent development of winglets retrofitting, a lot of classic Boeing models now have a 'wingleted' counterpart.
The question is, have specific IATA codes been created to distinguish them from the initial model (like in 738 for 737-800 without winglets, 73H with them...)?
I am particularly interested in IATA codes (if any) for these:
737-300 with winglets
737-500 with winglets
737-900 (non-ER) with winglets
757-200 with winglets
757-300 with winglets
767-300 with winglets
Thanks in advance!
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