KS Willamaon of New Zealand earned the distinction of scoring a hundred in his 50^th test when he scored 113 against Zimbabwe in the ongoing test at Bulawayo. His feat provides the 30th occasion of a batsman registering a hundred in his 50^th test in the annals of test cricket. All such occasions are listed below

No	Batsman	Team	Score	Inns	Opp	Venue	Start date
1	JB Hobbs	Eng	159	FI	Win	The Oval	14.08.28
2	PR Umrigar	Ind	112	FI	Pak	Delhi	08.02.61
3	TW Graveney	Eng	153	FI	Pak	Lord’s	23.06.62
4	KF Barrington	Eng	256	FI	Aus	Manchester	23.07.64
5	RB Simpson	Aus	103	SI	Ind	Adelaide	28.12.67
6	WM Lawry	Aus	205	FI	Win	Melbourne	26.12.68
7	CH Lloyd	WI	102	FI	Ind	Bridgetown	10.03.76
8	GR Viswanath	Ind	124	SI	Win	Chennai	12.01.79
9	SM Gavaskar	Ind	221	SI	Eng	The Oval	30.08.79
10	IT Botham	Eng	128	FI	Ind	Manchester	24.06.82
11	Javed Miandad	Pak	280*	FI	Ind	Hyderabad-Sind	14.01.83
12	N Kapil Dev	Ind	100*	SI	Win	Trinidad	11.03.83
13	IVARichards	WI	109	FI	Ind	Georgetown	31.03.83
14	JG Wright	NZl	138	SI	Win	Wellington	20.02.87
15	MA Taylor	Aus	170	FI	SAF	Melbourne	26.12.93
16	RA Smith	Eng	175	FI	Win	St John’s	16.04.94
17	MA Atherton	Eng	113	FI	Win	Nottingham	10.08.95
18	WJ Cronje	SAF	126	FI	Eng	Nottingham	22.07.98
19	G Kirsten	SAF	134	SI	Win	Centurion	15.01.99
20	ST Jayasuriya	Srl	188	FI	Pak	Kandy	28.06.00
21	MA Butcher	Eng	124	FI	Aus	Sydney	02.01.03
22	HH Gibbs	SAF	183	FI	Eng	The Oval	04.09.03
23	VVS Laxman	Ind	178	FI	Aus	Sydney	02.01.04
24	CH Gayle	WI	317	FI	SAF	St John’s	29.04.05
25	TM Dilshan	Srl	162	FI	Ban	Chittagong	03.01.09
	TM Dilshan	Srl	143	SI	Ban	Chittagong	03.01.09
26	AB de Villiers	SAF	104*	FI	Aus	Johannesburg	02.03.09
27	KP Pietersen	Eng	102	SI	Win	Trinidad	10.03.09
28	MJ Clarke	Aus	103*	SI	Eng	Birmingham	30.07.09
29	AN Cook	Eng	118	FI	SAF	Durban	26.12.09
30	KS Willamson	NZl	113	FI	Zim	Bulawayo	06.08.16

KS Willamson became the second New Zealand batsman to register a hundred in his 50^th test after JG Wright. JG Wright had scored 138 against West Indies at Wellington in Feb 1987.

No	Batsman	Team	Score	Inns	Opp	Venue	Start date
1	JG Wright	NZl	138	SI	Win	Wellington	20.02.87
2	KS Willamson	NZl	113	FI	Zim	Bulawayo	06.08.16

The following are the other statistical observations on the feat of batsmen scoring hundreds in their 50^th test. 

Javed Miandad scored hundreds in his debut test, 50^th test and 100^th test. He is the only batsman in the annals of test cricket to earn the distinction. Javed Miandad of Pakistan, GR Viswanath of India and AN Cook of England registered hundreds in his debut test and in their 50th test. TM Dilshan is the only batsman to register hundreds in both innings of his 50^th test. He is the 25th batsman to earn the distinction of scoring hundred in 50^th test. G Kirsten scored zero and 134 in his 50th test. CH Gayle {317} remains the only batsman to register 300 plus runs in his 50^th test. KF Barrington {256} is credited with the distinction of becoming the first batsman to score a double hundred in his 50th test. GR Viswanath-SM Gavaskar {brother-in-laws} are the only related cricketers in this elite list. KS Williamson is  the  only batsman in the  list  to score a century and a half century {113 and 68 not out} in  his 50th test