Guys it totally legit. These are Quiet hard to find so don't pull it a part!!!
There are 2 versions of the NO COO sensorscope R2, with originate from different factories. The common one with the COO at either 3 or 9 o'clock next to a leg and this rarer one between the legs.
It is sometimes referred to as a Meccano variant but to date no carded examples have been found.
Your example is worth about £50-£60 in that condition. If your selling it list it quick as I have a spare near mint one I'm going to put up for sale in the next month