The ballpoint is most likely a real Montblanc Noblesse I of stainless steel with gilded trim. In contrast to the more recent Noblesse range, the model works with a click mechanism whose spring-mounted clip triggers the retrieval function via a nipple; the deviating mechanism is thus typical and no authenticity indication against Montblanc. Matching refills are available via every Montblanc specialist retailer; before ordering, the exact construction or refill should be checked.