The Bohème Steel never existed, according to catalogues of official collectors, as a Mid-Size with fixed nib; the Mid-Size format had a screw-out nib unit or converter without safety mechanism. Steel/Noir models always had a black onyx in the clip; models with blue stone belonged to the Bohème/Silver line with grain guilloché, not the smooth steel version. The Big-Size variant always had a retractable nib and was only available in black precious resin with platinum-plated fittings. Solitaire models were generally delivered in France with 18-carat nibs; a 14-carat nib in such a Solitaire is therefore conspicuous. Authenticity features like the word Pix under the clip ring speak for an original; presumably a tinkering from two Bohème devices or a non-official special model is at hand. An authenticity check in the boutique is recommended.