It looks wall mounted to block or concrete and probably some kind of institutional setting where unplanned changes are generally frowned upon. Considering the alternate route looks to cost roughly a $1 and less than an hour time this is pretty good and makes actual repair sound wasteful. My only concern is certain times it may be difficult to discern between hand sizes, but it seems like the times it would occur (eg 7:37 or 9:50 when both hands are to be blocked by the bar) it probably wouldn’t throw anything off too greatly for the 5 minutes of limited visibility.