Thanks to Tom Ace!
“a variation on 3-cross lacing for 36-spoke wheels”
Hubs: Original Strida 18" 36H
Spokes: Sapim Leader 2,0 mm, length 156 mm
Nipples: Sapim Polyax 14 mm
Rims: Alex DV15 (6061H-T6, 355x15) 36H, Sclaverand valve hole (!)
Rim bands: Schwalbe HP rimtape 18-355 (10870061)
Tubes: Schwalbe SV4, Sclaverand valve (!)
Tyres: Innova 18" x 1,35
Air: Viennese, ~ 6,5 bar
Compared to Alex Y303 radial spoked, tyre 16" x 1,75:
Spoke pattern details: