This Nautical Diver Helmet Pen Holder version three completes the trio of vintage style deep sea diving helmet desk accessories with a third unique silhouette and detail variation. The helmet retains the recognizable porthole windows riveted seams and sturdy collar plate while the proportions and ornamental details have been refined to capture another era of historical diving equipment. The interior cavity remains sized for pens pencils markers and small office tools with a stable wide base that resists tipping during daily use. The geometry has been prepared for reliable slicing on FDM and resin machines with balanced wall thickness so makers of every level can produce satisfying copies. Office workers maritime enthusiasts collectors and gift makers can use this version alongside the first two to build a richly themed desk display or showcase it on its own as a feature accent. It works beautifully with small ship models brass tools compass replicas and seaside themed artwork. Recommended scale begins at twelve centimeters in height for a desktop version and can scale up to twenty centimeters for a larger feature piece. A layer height of 0.16 millimeters captures the rivet and porthole detail while keeping print time efficient. Tree supports are needed beneath the dome curve. Infill of 20 percent provides solid stability so the holder remains balanced when filled. Sanding priming and metallic paint with copper bronze and aged steel washes bring out the historical aesthetic. A weathered barnacle texture finish helps differentiate this third variant. Files are provided in OBJ STL and PLY formats for compatibility with all major slicers. Please Note: This STL file may require pre-printing preparation such as support analysis and positioning adjustments. Thickness verification and specific settings for your printer and filament may be needed. Other technical adjustments might be necessary depending on your equipment and printing method.