fabricated separately from the first housing the first and second housings jointly defining structure for locking the first housing to the second housing with any one of a plurality of predetermined fixed spacings between facing surfaces of the first and second housings interiorly of the locking structure application_number US 35044399 A description referring to fig1 4 wristwatch 10 is supported on display member 12 and has tag 14 secured therewith tag 14 is comprised of first and second separately fabricated housings 16 and 18 housing 16 defines an interior compartment 20 in which eas member 22 is secured housing 16 is elongate and has ratchet members 24 and 26 extending longitudinally from facing surface 16 a thereof a preselected transverse spacing s being provided between the ratchet members first and second openings 18 b and 18 c are provided in facing surface 18 a of housing 18 at transverse spacing s the housing preferably being hollow or otherwise having channels permitting free movement of ratchet members 24 and 26 therethrough openings 18 b and 18 c are of transverse width less than the transverse width of teeth 24 a and 26 a of ratchet members 24 and 26 whereby only unidirectional movement vertical upward movement in fig3 of the ratchet members into housing 18 is permitted as will be appreciated housings 16 and 18 are securable in either one of two mutual spacings of facing surfaces 16 a and 18 a i e a first spacing as defined by the uppermost teeth of ratchet members 24 and 26 being detented against downward movement by housing 18 surface bounding openings 18 a and 18.