Ronaldson Tippett – Dating Your Engine

Below is a guide of what the last engine number tested in that month was and the amount that was produced that month, followed by a yearly total.

Note: Numbers marked with * denotes the average number for that month.
Green or Black doesn’t denote anything, just makes it easier to distinguish between dates.

First column is the month, second column is the engine number they finished on for that month and the third column is the amount of engines made that month with a total at the bottom of the table.

	1911	Total
January	595
February	613	18
March	636	23
April	649	13
May	664	15
June	689	25
July	709	20
August	720	11
September	737	17
October	773	36
November	790	17
December	806	16
Year Total		211

	1912	Total
January	817	11
February	842	25
March	860	18
April	869	9
May	891	22
June	902	11
July	914	12
August	919	5
September	950	31
October	965	15
November	980	15
December	995	15
Year Total		189

	1913	Total
January	1010*	15
February	1025*	15
March	1040*	15
April	1055*	15
May	1070*	15
June	1084	14
July	1101	17
August	1120	19
September	1141	21
October	1160	19
November	1180	20
December	1197	17
Year Total		202

	1914	Total
January	1206	9
February	1211	5
March	1241	30
April	1253	12
May	1275	22
June	1288	13
July	1301	13
August	1321	20
September	1333*	12
October	1344	11
November	1354*	10
December	1364	10
Year Total		167

	1915	Total
January	1378	14
February	1388*	10
March	1397	9
April	1409	12
May	1414	5
June	1430	16
July	1441	11
August	1453	12
September	1465	12
October	1477	12
November	1496	19
December	1512	16
Year Total		148

	1916	Total
January	1521	9
February	1534	13
March	1551	17
April	1566	15
May	1579	13
June	1596	17
July	1614	18
August	1629	15
September	1648	19
October	1664	16
November	1684	20
December	1697	13
Year Total		185

	1917	Total
January	1716	19
February	1729	13
March	1754	25
April	1764	10
May	1788	24
June	1808	20
July	1828	20
August	1845	17
September	1864	19
October	1885	21
November	1902	17
December	1918	16
Year Total		221

	1918	Total
January	1930	12
February	1946	16
March	1967	21
April	1985	18
May	2007	22
June	2016	9
July	2042	26
August	2070	28
September	2098	28
October	2118	20
November	2159	41
December	2177	18
Year Total		259

	1919	Total
January	2208	31
February	2242	34
March	2276	34
April	2310	34
May	2344	34
June	2378	34
July	2412	34
August	2446	34
September	2480	34
October	2514	34
November	2548	34
December	2582	34
Year Total		405

	1920	Total
January	2650	68
February	2684	34
March	2719	35
April	2753	34
May	2820	67
June	2888	68
July	2922	34
August	3024	102
September	3093	69
October	3194	101
November	3229	35
December	3263	34
Year Total		681

	1921	Total
January	3331	68
February	3400	69
March	3435	35
April	3502	67
May	3570	68
June	3604	34
July	3638	34
August	3672	34
September	3740	68
October	3775	35
November	3809	34
December	3876	67
Year Total		613

	1922	Total
January	3910	34
February	3944	34
March	3978	34
April	4012	34
May	4046	34
June	4080	34
July	4114	34
August	4180	66
September	4214	34
October	4282	68
November	4350	68
December	4384	34
Year Total		508

	1923	Total
January	4418	34
February	4486	68
March	4554	68
April	4588	34
May	4656	68
June	4725	69
July	4760	35
August	4795	35
September	4829	34
October	4863	34
November	4897	34
December	4933	36
Year Total		549

	1924	Total
January	4967	34
February	5001	34
March	5035	34
April	5052*	17
May	5069	17
June	5087	18
July	5104	17
August	5121*	17
September	5138	17
October	5172	34
November	5206	34
December	5241	35
Year Total		308

	1925	Total
January	5275	34
February	5309	34
March	5343	34
April	5377	34
May	5411	34
June	5440	37
July	5518	70
August	5553	35
September	5599	46
October	5793	194
November	5810*	17
December	5827	17
Year Total		586

	1926	Total
January	5862	35
February	5880	18
March	5897	17
April	5960*	63
May	6022	62
June	6056	34
July	6090	34
August	6107*	17
September	6124	17
October	6150	34
November	6192	34
December	6300	100
Year Total		465

	1927	Total
January	6332	32
February	6364	32
March	6398	34
April	6432	34
May	6499	67
June	6532	33
July	6565	33
August	6898	333
September	6964	66
October	6997	33
November	7063	66
December	7095	32
Year Total		795

	1928	Total
January	7162	67
February	7196	34
March	7229	33
April	7278*	49
May	7327*	49
June	7376*	49
July	7425	49
August	7458	33
September	7491	33
October	7550	67
November	7591	33
December	7624	33
Year Total		529

	1929	Total
January	7657	33
February	7690	33
March	7756	66
April	7789	33
May	7854	65
June	7887	33
July	7903*	16
August	7920	17
September	7986	66
October	8019	33
November	8052	33
December	8083	31
Year Total		459

	1930	Total
January	8118	35
February	8151	33
March	8178*	27
April	8205*	27
May	8231	26
June	8257	26
July	8283	26
August	8316	33
September	8349	33
October	8358*	9
November	8367*	9
December	8375*	8
Year Total		292

	1931	Total
January	8383	8
February	8394*	11
March	8405*	11
April	8416*	11
May	8427*	11
June	8438*	11
July	8449*	11
August	8460*	11
September	8471*	11
October	8482*	11
November	8493*	11
December	8504*	11
Year Total		129

	1932	Total
January	8516	12
February	8549	33
March	8560*	11
April	8571*	11
May	8582	11
June	8599*	17
July	8615*	16
August	8648	33
September	8665*	17
October	8681	16
November	8747	66
December	8780	33
Year Total		276

	1933	Total
January	8797	17
February	8813	16
March	8846	33
April	8879	33
May	8896*	17
June	8912	16
July	8929*	17
August	8945	16
September	8978	33
October	9044	66
November	9078	34
December	9111	33
Year Total		331

	1934	Total
January	9144	33
February	9177	33
March	9210	33
April	9276	66
May	9309	33
June	9342	33
July	9408	66
August	9441	33
September	9507	66
October	9573	66
November	9639	66
December	9672	33
Year Total		561

	1935	Total
January	9771	99
February	9804	33
March	9837	33
April	9870	33
May	9936	66
June	9969	33
July	10002	33
August	10036	34
September	10069	32
October	10134*	66
November	10201*	67
December	10267	66
Year Total		595

	1936	Total
January	10333	66
February	10432	99
March	10498	66
April	10564	66
May	10663	99
June	10762	99
July	10828	66
August	10894	66
September	10992	98
October	11091	99
November	11157	66
December	11223	66
Year Total		956

	1937	Total
January	11288	65
February	11354	66
March	11452	98
April	11518	66
May	11584	66
June	11649	65
July	11748	99
August	12046	298
September	12178	132
October	12310	132
November	12478	168
December	12611	133
Year Total		1388

	1938	Total
January	12743	132
February	12909	166
March	13074	165
April	13239	165
May	13403	164
June	13566	163
July	13731	165
August	13896	165
September	14061	165
October	14235	174
November	14346	111
December	14526	180
Year Total		1915

	1939	Total
January	14600	74
February	14785	185
March	14934	149
April	15045	111
May	15193	148
June	15304	111
July	15452	148
August	15563	111
September	15638	75
October	15823	185
November	15971	148
December	16156	185
Year Total		1630

	1940	Total
January	16341	185
February	16563	222
March	16785	222
April	16970	185
May	17191	221
June
July
August
September
October
November
December
Year Total		1035

The following dates and engine numbers represent the last engine number made in that year.
** denotes unknown last engine number of that year.

1941	18836
1942	21969
1943	25195
1944	29027
1945	32844
1946	41843

1947	45920
1948	49937
1949	54208
1950	58547
1951	63002
1952	67587

1953	71340
1954	74967
1955	78972
1956	83393
1957	87666
1958	**

1959	**
1960	101253
1961	105507
1962	109105
1963	112624
1964	117227

1965	121333
1966	124090
1967	127436
1968	130791
1969	134110
1970	137032