The metal scales are 69mm long and have a different shape to the standard 75mm Cellidor scales, which have a more rounded and overlapping scale end. They have an 'Antique Silver' finish - See brochure below. Antique Silver is likely to be aluminum plated with silver - according to Victorinox Twitter links (2016) : - Link1, Link2, Link3
The 'top' scale on all models has metal ribbing and the Wenger logo. The bottom scale has an image of either a Eurasian otter, a snow leopard, or a polar bear,
According to Victorinox (Link4), this series is from the 90's. From the brochure below, it looks like this series was first issued with the otter and snow leopard, with the polar bear being added later.
There is a metal handled variant of the V.I.P. that has an identical scale material and shape to the Nature Series, but just with ribbed scales on both sides.
- 1.83.50: Snow leopard
- 1.83.51: Eurasian otter
- 1.83.52: Polar bear
- V.I.P. - Same toolset and size but with standard red synthetic scales
- VIP metal-scaled variant - Identical top scale to the Nature Series models; ribbed bottom scale matching the top scale (no animal image)
1999 Nature Series sales sheet from WENGER ... "featuring striking engravings with an antique silver finish"
By courtesy of Victorinox, 2016