what is the highest number of wins of an nba team before suffering their first loss of the season

The Boston Celtics won a dozen times versus the Knicks in 1959-60.

	TEAM	W	L	OPP	SEASON	GP	MPG	PPG	RPG	APG	FGM	FGA	FG%	FTM	FTA	FT%	TS%	MIN	PTS	REB	AST	PF
1	Celtics	12	1	Knicks	1959-60	13	240.0	129.3			52.8			23.8	31.5	75.4		3,120	1,681			325
2	Pistons	11	1	Hawks	1954-55	12	240.0	92.3			32.2			27.9	37.6	74.3		2,880	1,107			277
3	Hawks	11	1	Royals	1958-59	12	242.1	110.8			41.4			27.9	38.0	73.5		2,905	1,329			289
4	Nationals	11	2	Knicks	1959-60	13	240.0	120.2			46.4			27.4	34.0	80.5		3,120	1,562			316
5	Pistons	11	2	Royals	1960-61	13	240.0	125.7	57.7		46.3			33.1	44.2	74.9		3,120	1,634	750		360
6	Warriors	11	2	Knicks	1960-61	13	243.8	121.2	66.0	26.5	47.9	109.6	43.7	25.3	39.0	64.9	47.8	3,170	1,575	858	344	321
7	Lakers	11	1	Pistons	1962-63	12	240.0	123.3			47.4			28.5	37.3	76.5		2,880	1,480			266
8	Royals	11	1	Knicks	1963-64	12	240.0	122.8	62.8		46.7	101.3	46.1	29.4	37.8	77.8	52.1	2,880	1,473	754		321
9	Lakers	10	0	Blackhawks	1950-51	10	242.5	95.5			34.5			26.5	36.1	73.4		2,425	955			288
10	Knicks	10	0	Bullets	1952-53	10	250.0	94.8			33.4			28.0				2,500	948
11	Knicks	10	0	Warriors	1952-53	10	242.5	87.6			31.8			24.0	34.5	69.6		2,425	876			230
12	Hawks	10	3	Lakers	1959-60	13	241.9	113.9			42.0			29.9	39.6	75.5		3,145	1,481			338
13	Celtics	10	3	Knicks	1960-61	13	240.0	120.4			46.8			26.8	36.0	74.6		3,120	1,565			330
14	Hawks	10	3	Pistons	1960-61	13	240.0	122.2			48.3			25.6	35.4	72.4		3,120	1,589			358
15	Celtics	10	3	Nationals	1960-61	13	243.8	124.5			47.3			29.9	41.5	72.0		3,170	1,619			339
16	Celtics	10	2	Nationals	1961-62	12	240.0	121.0			45.8			29.3	40.7	72.1		2,880	1,452			296
17	Lakers	10	2	Hawks	1961-62	12	242.1	124.9	60.1		46.8	103.3	45.3	31.3	42.3	74.0	51.2	2,905	1,499	721		299
18	Warriors	10	0	Packers	1961-62	10	242.5	123.7			50.7			22.3	31.9	69.9		2,425	1,237			229
19	Celtics	10	2	Knicks	1962-63	12	240.0	119.8			46.8			26.3	35.9	73.1		2,880	1,437			294
20	Nationals	10	2	Knicks	1962-63	12	240.0	126.1			44.9			36.3	44.9	80.7		2,880	1,513			327
21	Royals	10	2	Knicks	1962-63	12	242.1	114.0	61.8		43.9	95.3	46.1	26.2	36.7	71.4	51.2	2,905	1,368	742		320
22	Hawks	10	2	Pistons	1963-64	12	242.1	110.2			40.0			30.2	40.3	74.8		2,905	1,322			334
23	Celtics	10	2	76ers	1963-64	12	240.0	113.7			45.3			23.0	31.8	72.4		2,880	1,364			327
24	Celtics	10	2	Knicks	1963-64	12	240.0	127.9			51.7			24.6	33.0	74.5		2,880	1,535			295
25	Celtics	10	0	Pistons	1964-65	10	240.0	113.6			44.4			24.8	32.4	76.5		2,400	1,136