(b) Each lot number had an interfix number between the manufacturer's identification symbols
and the serial number. The interfix number indicated the lots made according to a specific
design or manufacturing procedure.
(c) The serial number identified the lot according to the sequence of production. A number was
assigned to each lot. The serial number began with the number 1 and continued in sequence
until production of the item was terminated or completed.
(3) The new ammunition lot numbering system consists of a manufacturer's identification symbol, a
numeric code depicting the year of production, an alpha code representing the month of
production, a lot interfix number followed by a hyphen, and a lot sequence number. An alpha
character may be used as an ammunition lot suffix to denote a reworked lot.
The ammunition lot number is no longer than fourteen characters in length, with no characters
separated by spaces. The minimum number of characters used is thirteen. The ammunition lot
number for the new system is as illustrated in Figure 10, page 19.
k. Description and use of lot numbers for maintenance operations.
(1) The old lot numbering system for renovated, modified or regrouped operations, which are
performed subsequent to acceptance of the munitions into the stockpile and to restore them to
issuable condition, is as follows:
(a) Ordinary maintenance, when new components replace like components, a lot suffix will be
assigned by the responsible service.
EXAMPLE:
US Army, Korea, Special Ammunition Depot 200 replaces fuzes on complete rounds of lot
LOP-1-8; the suffix furnished changes the lot number to LOP-1-8A, B, C, etc., as applicable.
(b) Extensive maintenance, where different components are added or work is extensive enough
to warrant model number change.
EXAMPLE:
(1) Cartridge, 105mm HE, M1 changes to cartridge, 105mm HE, M1A1; (2) replacement
Fuze; PD, M52 to M525 and; (3) replacement of Fuze; MTSQ, M5000A1 to M520A1.
(c) New lots will be formed in accordance with the requirements of the maintenance directive.
Let numbers will be assigned in the normal manner except that the interfix number will start
with 500 instead of 1, and the manufacturer's symbol will be that of the facility performing
the work.
(d) Lot numbers are furnished to the maintenance facility by AMCCOM.
(2) The new lot numbering system for renovation and modification is basically the same as the old
system:
(a) Ordinary maintenance. When new components replace like components (same model
number), a lot suffix will be assigned by the responsible service. Example is provided under
paragraph 2.k.1(a) above.
MM0160
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