Mubvunzo
Chii Chinonzi Grain Grading?
Mhinduro
Mari yekutengesa inzira yekuenzanisa nyika yekuchengetedza uye kupfeka pane imwe mari. Pano pane zvikamu zvitatu zvakakosha zvokufungisisa paunenge uine mari:
- (a) Unhu hwemari hunofa uye hunhu hunoparadza
- (b) Mamiriro uye maitiro e planchet (mari isina chinhu)
- (c) Zviyero uye rudzi rwekufuka, kukuvadza, uye ziso rose rinokumbira mari
Nokuda kwemari yakawanda yakaparadzirwa, (c) ndiyo inonyanya kukoshesa kushandiswa kwemari yedu, kunyanya kuwanda kwekushandira mari yakawanda uye rudzi rwekukuvadza rwakatambudzwa, kusanganisira zvinhu zvakadai semanzwiro, dents, zvinyorwa, nezvimwewo.
Kuti udzidze matanho ekutanga kutora makobiri uchishandisa nzira iri nyore-nhatu, ona:
Coin Grading Scales
Shanduro inonyanya kushandiswa yekuisa mari inonzi Sheldon Scale. Inoumbwa nenhamba ye-70-point, kubva pa1 kusvika ku70, ine chirevo chechirevo chechigadziro chakakonzerwa nekujekesa. Mienzaniso yezvikwereti zvemari paSheldon Scale inosanganisira zviyero zvakadai seVF-20 (zvinoreva Zvakanyanya Zvakanaka 20,) EF-45 (Yakanyanya Zvakanaka 45,) uye MS-60 (Mint State 60.) Mari dzisina kukwana dzinogara dzichinzi "Mint State" pane Sheldon yemari yakawanda, uye akafuridzira kushandisa MS.
Zvipikisheni zvinoshandiswa neSheldon Scale zvakashandiswa kwemakore anopfuura 150. Pamberi peSheldon Scale yakauya, mari yakarondedzerwa neshanduro chete. Kuita mari yakawanda ndiyo yakanyatsotarisa uye inotambudza, sezvo VF murume mumwe aiva EF yemumwe murume.
Mari yevatengesi vaiwanzopomerwa mhosva yekuwedzera mari yekuwana mari yakanakisisa yaro. Kuwedzera kuenzanisa kwenhamba yeSheldon scale yakabatsira kusimudzira adjectival grading.
- Adjectival Coin Grading System
The History of Coin Grading
Mari yekutengesa ine nhoroondo inofadza inobatidza kushanduka kwemari yemari yemari yakawanda kuburikidza nemakore.
Semuenzaniso, pamberi pemakore ekuma1850, mari yemazuva ano yaiwanzoonekwa seyakatenderedzwa kana yakasarudzwa. Vamwe vatengesi vanofambira mberi vakatanga kusiyanisa pakati pezvinyanya kuparadzirwa uye zvisinganyanyi kuparadzirwa. Sezvo vateresi vakazove vakanyanyisa kunzwisisika (uye vanocherechedza) zvimwe zvakasiyana zvakasiyana zvakawedzerwa, kusvikira nhasi tine nzira yakaoma yakaoma makumi manomwe-70 iyo inosanganisira vamwe vavakadzi vanoenderana nehutano hwekutsvaga kwepakutanga, se "Mitsara Yakazara" (paJefferson Nickels) uye "Musoro Wakazara" paChimiro Chekudzikinurwa Kwemakamuri. Dzimwe nguva asterisk inowanikwa mushure mechikwata ichireva chePQ (Premium Quality) yemari mune bhidhiyo, kuitira kuti tive ne MS-67 * FS Nickel! (Izvi zvinoshandura seMint State 67 PQ neMatanho Akazara.)
Rwendo rwunobva "Kusarudzwa" kusvika "MS-67 * FS" runonakidza.
- The History of Coin Grading Systems
Yakarongedzwa na: James Bucki