Had the opportunity to handle this Orient Star Semi-skeleton model. This is a recent release which is available both in the Japanese and international market. Model number in Japan is WZ0201DK.
This watch features power reserve indicator, open heart, second hand sub-dial, hack and handwind as well as Sapphire crystal with anti-reflective coating. Here is a quick pictorial review.
Strap and buckle:
Lug width: 21mm
Water resistance: 100 bar
Orient Star DK05004K featured in this post is provided by
1 Commonwealth Lane,
#03-24, One Commonwealth
Tel: 6273 3355 Fax: 6278 8929