▁the ▁st amps ▁were ▁printed ▁rot ated ▁ 1 8 0 ° ▁to ▁each ▁other ▁along ▁the ▁separation ▁line . ▁Phil atel ists ▁describe ▁the ▁two ▁st amps ▁which ▁are ▁ups ide ▁down ▁in ▁relationship ▁to ▁each ▁other ▁as ▁tête - b ê che . ▁Some ▁issues ▁have ▁tête - b ê ches ▁as ▁well ▁as ▁gut ters . ▁ ▁Like ▁gut ters , ▁tête - b ê ches ▁are ▁very ▁popular ▁with ▁collect ors ▁due ▁to ▁their ▁scarc ity ▁and ▁decor ativ eness . ▁ ▁St amp ▁arrangement ▁and ▁location ▁ ▁The ▁st amps ▁are ▁arranged ▁on ▁the ▁sheet ▁in ▁a ▁table ▁with ▁rows ▁and ▁columns . ▁Due ▁to ▁this ▁arrangement , ▁the ▁location ▁of ▁each ▁stamp ▁can ▁be ▁precisely ▁determined . ▁The ▁phil atel ist ▁counts ▁the ▁single ▁st amps ▁hor izont ally ▁from ▁left ▁to ▁right , ▁but ▁the ▁post ▁counts ▁them ▁vert ically ▁from ▁top ▁to ▁bottom . ▁According ly , ▁the ▁third ▁stamp ▁in ▁the ▁sixth ▁row ▁of ▁a ▁sheet ▁of ▁ 1 0 ▁x ▁ 1 0 ▁would ▁be ▁the ▁ 5 3 rd ▁stamp ▁of ▁the ▁sheet ▁for ▁the ▁collect or , ▁but ▁the ▁ 2 6 th ▁stamp ▁for ▁the ▁post . ▁ ▁The ▁first ▁post age ▁st amps ▁of ▁the ▁UK , ▁the ▁Pen ny ▁Black , ▁were ▁printed ▁in ▁sheets ▁of ▁ 2 0 ▁rows ▁and ▁ 1 2 ▁columns , ▁but ▁the ▁location ▁on ▁the ▁sheet ▁was ▁indicated ▁by ▁different ▁letters ▁in ▁the ▁bottom ▁corners ▁of ▁each ▁stamp . ▁An ▁" A