MR PORTER unveils Montblanc Summit Smartwatch Collection on site. MR PORTER launches with five different variations, with two variations to follow – all housed within a 46mm case in black PVD coated stainless steel, bi-colour stainless steel or grade 5 Titanium, coupled with a selection of sporty and classic straps in rubber, calfskin leather, and Sfumato calfskin leather handcrafted in the Montblanc Pelletteria in Florence – in a range of easy to wear, tonal colours including black, brown, green and deep blue.