Original 1960’s rubber strap from Switzerland, the tropic. This is a Tropic Star in 18mm with straight ends in blue, never worn with an Inox signed stainless steel buckle (16mm on the inside). When fastened in the longest position it measures 17cm from lug to lug so just ad your watch size and you know the total length it will cover. Do check the attached video for some tweaking experience concerning rubber straps from YouTube! More straps and accessories at www.sometimeago.com.