After the B-737-200 (link) and B-737-800 (link), here's at last the Big Plane Kits (BPK) 1/72nd Boeing B-737-100 - ref. 7201
Source: https://www.facebook.com/BigPlanesKits/posts/2810667222544336
Available here: https://bigplaneskits.com/shop/bigplaneskits/737-100-7201/
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V.P.