I wonder if the high-end brands have difficulty equalizing inventory across their boutique networks. I often read posts about the lack of any steel Rolex sport models in stock, wait lists being closed, etc., while at the same time I've seen a couple local ADs near me with some great steel pieces in stock in the windows. Granted, that's at the AD level which is a bit different than the boutique experience you've described. I haven't been in about a year, but the RM 'boutique' inside Harrods is always well stocked with their mainstream pieces, along with some exceptional pieces.