Popular Seiko 5 Auotmatic military style watches in 3 dial colours with matching canvas straps for $99.00, usually $140-$160. Case diameter is 37mm to fit slimmer wrists.
Blue: https://www.amazon.com.au/Seiko-SNK807-Automatic-Stainless-C…
Beige: https://www.amazon.com.au/Seiko-SNK803-Automatic-Watch-Canva…
Green: https://www.amazon.com.au/Seiko-SNK805-Automatic-Stainless-C…